Why is it okay for dogs/cats to like their assholes but humans can't? I mean, if Jack or Jane wanted to cleanse themselves who are we to frown upon that? Granted, that shit is nasty, but live your life maaaaaaaaaaaaan.
Dogs/cats could use the carpet or a towel on the floor, so your post isn't really groundbreaking...or thread-ending worthy.
Have you ever had sex with a girl? Pretty sure you'd rather bust in the ass so you don't end up a teen dad...just saying.