1. Intromission usually occurs in trees on horizontal limbs about off the ground.2. These structures make it harder for males to achieve intromission . 3. The stimulation following intromission causes the female to be immobilized. 4. Also, they may evolve shield over their genital openings to prevent intromission . 5. The Count's bite on the neck can only be called an intromission . 6. Taqi al-Din also used astrophysics to explain the intromission model of vision. 7. The male pronghorn usually ejaculates immediately after intromission . 8. The front legs of the male hang loosely and intromission takes the form of a " copulatory jump ". 9. In most mammals ejaculation occurs after multiple intromissions , but in most ruminant species, a single pelvic thrust occurs during copulation. 10. Following a typically 5-87 min penis intromission with usually successful sperm transfer, the male actor retracts to terminate copulation.
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