This research aimed to explore the narratives of romantic jealousy in the context of infidelity for heterosexual and homosexual men from Johannesburg South Africa. This study takes on a qualitative approach using a narrative analysis in combination with a structural and thematic content analysis. The narratives of the heterosexual and homosexual men revealed the role which jealousy plays in every relationship, and how it can affect the emotions and behaviours of both partners. This study found that the narratives of these men were in contradiction to what evolutionary theories as well as past research on the topic have suggested. Evolutionary perspectives propose that heterosexual men are more inclided to sexual infidelity, this was however found to be in contradiction to the beliefs and ideas held by the participants of this study. Heterosexual participants of this study reported that for them emotional infidelity would be more jealousy provoking, as it would be a sure indication that the relationship would end. Past research findings on the other hand have suggested that homosexual males are more inclined to emotional infidelity, as they do not face the risk of cuckholdry. However the same can not be said for the narratives of the homosexual participants of this study. The narrative of all except for one homosexual participant indicated that homosexual men felt that they would be greatly affected by sexual infidelity rather than emotional infidelity. There explanations revolved around the open ended nature and ease of access to sex which is prevalent in the gay community. It is also important to note that simmilarly to the heterosexual group, most of the participnats who experienced sexual jealousy also experienced sexual infidelity. Indicating a link between the type of infidelity you experience to the type of jealousy you feel. This research identified that heterosexual participants felt that in their live stories they found emotional jealousy to be the worst apsect of infidelity while homosexual men felt that sexual jealousy was the worst aspect of infidelity.

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The current study explored coping strategies toward the context of discovering a partner's sexual infidelity. There were two primary goals for the current study. First, the current study examined the gender and national differences in conflict styles toward the context of discovering a partner's sexual infidelity. Second, the current study examined the relationship between face concerns and commitment. There were national and gender differences on self-construal face concern, face-concern and conflict styles in the current study. The current findings also suggested that face concern is moderating the relationship between commitment and conflict styles. The limitation and future directions were discussed as well as the clinical implications in the current study. / Ph. D.

Sexually transmitted infections (STIs) have important consequences for individuals and society. Extensive literature has shown that various individual factors impact STIs. However, much less is known about their structural causes and how they affect sexual behavior and sexual network formation. In the first two chapters of this dissertation, I investigate how sex ratios and ethnic divisions affect sexual activity and the spread of STIs. In the third chapter, I analyze the effect of ethnic-based romantic homophily on STIs. I provide a brief description of each chapter below. Chapter 1. We extend a theory of fidelity in a two-sided economy, and empirically discriminate between different rationales of sexual network formation by testing their implications for how sex ratios affect sexual activity, relationship stability, and the spread of sexually transmitted diseases in men versus women. We use a unique individual-level dataset in combination with census data from England and Wales, a setting where adult women outnumber adult men. Exploiting variation in cohort/ethnicity/region-specific sex ratios as a quasi-natural experiment, we find that a decrease in sex ratio imbalance decreases sexual infidelity and the number of serial partners, and increases the likelihood of safe sex. This in turn reduces the likelihood of acquiring a range of sexually transmitted infections and diseases, including chlamydia, gonorrhoea, genital warts, and herpes. Consistent with the rationale underlying the formation of egalitarian (in)fidelity networks, the effects of the sex ratio on sexual activity are larger for men compared to women, while its effects on sexual diseases are larger for women compared to men. The causality of these effects is established using classical and recent instrumental variables approaches and various robustness checks. For falsification, we show that sex ratios have no impact on several "atheoretical" health conditions, such as Parkinson's disease, chronic lung disease, heart attack, stroke, and diabetes, which do not arise from sexual interactions. Chapter 2. In societies organized around distinct racial and ethnic groups, limited communication between these groups might increase the search cost of sexual partners outside of own group, leading to racially segregated sexual networks and low risks of sexually transmitted diseases. At the same time, because sexual infidelity is more likely to be discovered when the cheated-upon individuals are co-ethnics, individuals in multiracial societies might find it cheaper to select sexual partners from diverse ethnic groups to hide their infidelity, which would lead to large interethnic sexual networks and high risks of STIs. We test these conflicting hypotheses by analyzing the causal effect of neighborhood-level racial diversity on sexual activity and STIs, using unique individual-level data from England, Wales, and Scotland. We find that individuals residing in multiracial neighborhoods have a greater number of sexual partners and are more likely to be infected with a wide range of STIs than their counterparts residing in more racially homogeneous neighborhoods. We use traditional and new instrumental variables approaches and various robustness checks to establish causation. Analyzing mechanisms, we find that within racially diverse neighborhoods, individuals who select sexual partners from diverse racial groups are more likely to be infected with STIs, holding the number of partners and other individual characteristics fixed. For falsification, we conduct a reverse-placebo test showing that racial diversity has no effect on a wide range of health conditions that do not arise from sexual interactions. From a policy perspective, our analysis implies that policies that promote racial and ethnic integration are likely to reduce unhealthy sexual activity and the spread of STIs in racially heterogeneous societies. Chapter 3. A classical hypothesis in social network theory holds that central individuals are more likely to receive and spread information than are their peripheral counterparts. We test this hypothesis in the context of sexual networks and sexually transmitted diseases, using data from the United Kingdom. Romantic homophily - the tendency to select sexual partners with similar ethnic background - is used as a measure of the extent to which an individual is peripheral in a sexual network. We find that more sexually homophilous individuals have a lower risk of sexual infections. This effect is causal, and larger for women, Whites, and heterosexuals.