Given that the Affinity 2.0 is a largely untested instrument that purports to measure sexual attraction, it was unknown whether or not the instrument is temporally stable and would provide a characteristic response curve for normal heterosexual male sexual interest. This study examined the Affinity 2.0, a newly standardized viewing time (VT) instrument that purports to measure sexual interest. More specifically, the Affinity 2.0 was examined in regard to its temporal stability and ability to generate a characteristic curve for non-pedophilic, exclusively heterosexual male interests. This examination was carried out by administering the Affinity 2.0 twice on a sample of 88 self-reportedly non-pedophilic, exclusively heterosexual men. The results of this study find the Affinity 2.0 to be mildly to moderately temporally stable and capable of rendering a characteristic sexual interest curve. Subjects created a typical profile that showed longest viewing time to images of adult and juvenile females with low viewing times to all other categories of attractors. Implications for norm-referenced decision making are discussed.