General Discussion
In reply to the discussion: Witchwind: "No woman is heterosexual" [View all]Manifestor_of_Light
(21,046 posts)Lower animals have lots of eggs and external fertilization. Lots of zygote mortality in the environment.
Later internal fertilization developed, to produce fewer eggs and protect each individual offspring with more energy and time invested. This introduced the need for the penis to deposit sperm. Some ducks have them, and some reptiles like crocodiles.
And in mammals a long gestation time is needed, depending on size. Fewer offspring are produced the bigger the mammal is. And penes are necessary to internal fertilization the biological way.
Smearing semen on the vulva is not the most efficient way. The vagina is normally slightly acidic which helps the sperm survive. Also the cervix is not completely passive.
The author doesn't understand basic mammalian reproductive biology.
I'm not going to address why PIV is fun, because I must be brainwashed, right???