While it is generally assumed that alcohol consumption plays some role in the advent of negative sexual outcomes among college students (sexually transmitted diseases, unplanned pregnancies, and date rape), that role has not been empirically demonstrated or quantified. The purpose of this study was to assess the association of alcohol consumption with negative sexual outcomes in college women. Specifically, this study attempted to determine this association by means of a survey administered to a population of women students from Oregon State University and Western Oregon State College (n =430). Data collection took place during winter term, 1991. Average monthly alcohol consumption was assessed, as well as the frequency of alcohol consumption prior to sexual intercourse. The association of alcohol consumption with experiences of sexual coercion, in both the victim and the perpetrator, was also assessed. Negative sexual outcomes assessed were sexually transmitted diseases (STDs), unplanned pregnancies and pregnancy "scares", four categories of sexual coercion (unwanted touching, verbally forced date rape, physically forced date rape, and stranger rape), and unprotected intercourse (condom usage). A strong association between alcohol consumption and sexual coercion was found. Women who had experienced sexual coercion consumed significantly more alcohol on the average than those who had not had such experience. Also, it was found that alcohol was consumed by the perpetrator, the victim, or both in the majority (57-69%) of incidents of sexual coercion. While women who had experienced STDs appeared to drink more (mean monthly alcohol consumption= 16.9 drinks) than those who had not experienced STDs (mean monthly alcohol consumption= 12.3 drinks), small cell size and sample variability made meaningful statistical comparisons inappropriate. No association between alcohol consumption and unplanned pregnancies and pregnancy "scares" was found. Alcohol consumption prior to intercourse had a paradoxical relationship with both sexually transmitted diseases and condom usage: those who always or never drink prior to intercourse were less likely to experience an STD and more likely to use condoms than those who say they occasionally drink prior to intercourse. It is recommended that university health educators disseminate the findings on alcohol consumption and sexual coercion and STDs. It is also suggested that they, along with those responsible for student services and university policies, should encourage non-alcoholic forms of social support, stress management, and recreation on campus. An additional recommendation was that both qualitative research and longitudinal studies be done to follow up the exploration begun in this study. / Graduation date: 1992

This review of sexual education in the United States broadly defines the two most common approaches in sexual education seen in this country today. I cover the status of certain sexual behaviors and risks amongst the teenage population in the U.S. and specifically cover reported sexual activity in high school students and overall data on teen pregnancies and sexually transmitted infections (STIs). This work specifically looks at Maine, California, Texas, Maryland, North Carolina, and New Mexico to highlight the variety of state policies concerning sexual education and the differences in teenage sexual behaviors that exist within each of those six states. A description of how cultural influences can affect a young person’s sexual behavior is also given. In the final discussion section of this paper I have emphasized the need for more comprehensive sexual education programs in the United States and the importance of providing culturally sensitive programs in order to continue the fight against teenage pregnancy and STI rates in adolescents.

In most animal species, reproductive success depends critically on precopulatory or solicitational behaviors that occur prior to mating. The specific sensory systems and behavioral strategies employed in precopulatory behaviors vary across species; in all cases, however, animals must be able to identify potential mating partners and solicit sexual interest. Female Syrian hamsters (Mesocricetus auratus) engage in multiple forms of precopulatory behaviors that are preferentially expressed to males or their odors, including vaginal scent marking and sexual odor preference. Conspecific odors relevant for precopulatory behaviors are processed by a network of forebrain areas that includes the bed nucleus of the stria terminalis (BNST) and the medial preoptic area (MPOA). The precise functional and neurochemical mechanisms whereby these areas regulate the expression of precopulatory behaviors, however, are unknown. Therefore, the aim of this dissertation is to address the following research questions: (1) Is the neuropeptide oxytocin (OT), acting within BNST or MPOA, necessary for the normal expression of odor-­guided precopulatory behaviors? (2) Is BNST or (3) MPOA required for the preferential expression of vaginal marking or investigation towards male odors?, and (4) Does OT interact with social odor processing to regulate vaginal marking? We found that blockade of OT receptors (OTRs) in MPOA and BNST decreased vaginal marking to male odors. There was no effect of OTR blockade on sexual odor preference. Selective lesions of BNST also disrupted preferential vaginal marking responses to male odors, without affecting sexual odor preference. In contrast, lesions of MPOA disrupted odor preference without affecting vaginal marking responses. Finally, central blockade of OTRs eliminated the normal pattern of increased activation of neurons to male vs. female odors in BNST, but not MPOA. Considered together, these results suggest that OT normally acts within BNST to drive preferential vaginal marking responses to male odors via selective facilitation of neural responses to these odors, and further, that there are separate and distinct neural circuits that regulate different forms of odor-guided precopulatory behaviors in females.

The United States continues to be affected by the HIV/AIDS epidemic, and now public health is faced with new challenges in mitigating the spread of the disease. African-Americans are disproportionately affected by HIV and a further understanding about the factors that influence high risk sexual behaviors needs to be continuously examined. The aim of this study was to understand and compare the the perception of HIV risk and factors associated with risk perception in high risk adult and adolescent groups. After multivariate analysis, having multiple partners was the only predictor of an increased risk perception among adults. Among adolescents, no significant relationship was found between HIV risk indicators and having an increased HIV risk perception. Both adults and adolescents appeared to underestimate their HIV risk based on their reported risk sexual behaviors. More work is necessary to help adolescents accurately assess their risk of infection.

In the stallion, inconsistent sexual behavior and variable semen quality are common. This reproductive variability has been attributed to differences in circulating hormone concentrations. In order to further examine this relationship, 7 miniature stallions were observed for sexual behavior and semen characteristics. Blood was also drawn from each stallion 15 min before mating (time -15), immediately following ejaculation (time 0) and at times following ejaculation (times +15, +30, and +60). Plasma was later analyzed for concentrations of testosterone (T), estrone sulphate (ES) and cortisol. Semen was evaluated for volume, sperm concentration and progressive motility. Sexual behavior was quantified by assigning a libido score to each stallion, recording reaction time and the number of jumps required for ejaculation. Upon statistical analysis, data revealed both ES and cortisol increased at the time of semen collection (P < 0.05), while T did not. Regression analysis revealed that ES and the ratio of ES to T at times -15, +30, and +60 were negatively correlated to libido scores. Additionally, a positive relationship was found between ES at times -15 and +60 and reaction time, as well as between cortisol at times -15, 0, and +15 and libido scores. No relationship was observed between T and sexual behavior. However, T at time -15 was positively correlated to progressive motility, and the ratio of ES/T at time -15 was negatively correlated to progressive motility. No other association was detected between ejaculate parameters and hormone concentrations. These results not only serve to enhance understanding of stallion hormone profiles, but also provide further insight into the hormonal control of sexual behavior and sperm production. This knowledge can be used to generate improved management techniques for stallions that are inconsistent in sexual behavior and sperm output.

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 122-136). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 153-164). Available also in a digital version from Dissertation Abstracts.

Mimicry, an adaptation to deceive, fascinated early naturalist and has been proof of evolution by natural selection since proposed by Henry W. Bates 150 years ago. Yet, despite the abundant theoretical and empirical work that it has inspired, little is known of effects in intra and interspecific communication that might result from resembling phenotypic traits of sympatric species. In this dissertation research I studied sexual behavior and communication in Heliconius, a genus of diverse toxic butterflies with extraordinary convergence in wing coloration, habitat preferences and flight characteristics. Well-known ecological interactions and evolutionary history of Heliconius contrast with a poor understanding of key elements of their sexual behavior and intraspecific communication, which are central for the evolution of mimicry in this genus of butterflies. This thesis starts with an introduction that, expanding on the ideas above, explains the motivation behind studying sexual communication and behavior in Heliconius. In the subsequent four chapters I report on two aspects of sexual behavior that are presumably connected in these butterflies with the occurrence of mimicry: Pupal mating behavior and antiaphrodisiac pheromones. Pupal mating is a mate-searching strategy wherein males find females when still immature and guard them with the goal of mating at female eclosion. This mating behavior might have influenced the evolution of mimicry as males rely less on commonly used species recognition traits that in mimetic Heliconius are shared with coexisting species. I identified cues males use to find and recognize conspecific immatures, which not only come from the animal themselves but also from the host plant where they are located. Chemical and visual cues are involved in the process of finding partners, but only sex-specific pheromones allow males to identify females before their eclosion. The second aspect of sexual behavior studied in Heliconius involved the identification of a pheromone that, after being transferred to females at mating, renders them unattractive to courting males. Variation in the chemical composition of such antiaphrodisiacs across eleven species in this genus showed that, contrary to my expectations, there is no evidence that mimicry has affected the evolution of this signal. Instead, I found that clade-specific mating systems in these butterflies adequately explain the observed patterns of interspecific variation. / text

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