A couple days ago I was listening to Australia’s fine science show (which is aptly entitled “The Science Show”) when a snake expert dropped a bombshell. He casually mentioned that snakes have two penises (penii?). He also mentioned that in regard to the usage of penises (penii?), some snakes are apparently “left-handed”, others are “right-handed”, and still others just use whichever of the two is most convenient at any given time. He didn’t specify whether or not they can use both simultaneously. (Note to self: check the Internet for snake threesomes.)
That was the coolest thing I’ve ever heard, but within minutes I was blown away yet again. The snake expert mentioned that the male snake’s kidneys exude some sort of chemical at the end of the ejaculatory process which finds its way into the female snake’s vagina before hardening into an impenetrable plug. This prevents any other snakes from having sex with this particular female until the male’s semen has had time to fully fertilize all her eggs.
Now that’s what I call “cock blocking.”