Abstract
A series of 4 experiments investigated the responses of Sprague-Dawley male rats to the odors from sexually receptive females. Having established that Sprague-Dawley male rats prefer the odors of estrous females and that the preferences are not a function of the female's movements or sounds (Experiment 1), the contribution of the various components of the males' copulatory pattern to the development of preferences was examined (Experiment 2). The results showed that sexually naive males fail to show a sex odor preference and that mounting experience is sufficient for the preferences to appear. Experiment 3 investigated the relationship between the presence or absence of the testes and the sex odor preferences; approximately 3 weeks following castration the preferences disappear. Experiment 4 examined whether neonatal testicular secretions are necessary if the male rat is to display a sex odor preference in adulthood. Following testosterone propionate administration and mounting experience, Day 1 castrates showed a sex odor preference.
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