A fascinating study has found that sniffing female tears significantly reduced male aggression and decreased activity in aggression-related brain networks. It’s suggested that the effect, which is caused by chemical signals in tears and is also seen in rodents, serves a protective function.
It doesn’t prevent the rape, but they do have “cul-de-sac pouches en route, that could prevent fertilisation by capturing unwelcome sperm.” So they can choose whether or not they get fertilized. Which is at least some sort of a defense. Edit: link for quote
“If it’s a legitimate rape, the female body has ways to try to shut that whole thing down.”
Turns out he was thinking about ducks all along.
FTFY
Dolphins do as well. They can move their tail in such a way that forces the ejaculate into a blind alley preventing fertilization.
Dolphins are quite rapey.