Once upon a time, while we were having regular sex, my ex asked me if I wanted to do her in the butt. I expressed my lack of interest in the idea, but she insisted, claiming that I would like it because it was nice and tight, so I decided to play along.
Bad Idea.
She turned around and got on all fours, and helped guide me to her asshole. The moment I put it in her the most foul, nauseating, sickening stench filled the room. I had to lean forward and bury my nose in her hair to keep from throwing up. I waited a second to catch my breath, and then ran to the bathroom to scrub my dick off.
Needless to say, that will never happen again. (_o_) = exit only.