During each of the 5 sex test sessions, bHR/bLR males were exposed to a sexually receptive female for 30-min. During the first two test sessions, a greater percentage of bHRs mounted the females compared to bLRs, but by session 3, a similar proportion of bLRs exhibited mounting behavior (A). Similarly, during the first two test sessions, a greater percentage of bHRs exhibited intromissions (B) and ejaculated compared to their bLR counterparts (C). A similar proportion of bLRs and bHRs were engaged in intromissions and ejaculation during test sessions 3-5. * indicates p<0.05