here’s all the animal sex facts i know (a review for some ppl) 1. Male ducks have corkscrew-shaped penises. 2. Female ducks can keep the muscles in their vaginas taut so males' penises can't get in. 3. Female kangaroos have three vaginas. 4. Male rhesus macaque monkeys will "pay" to see female rhesus macaques' bottoms. 5. Nearly all bonobo......