Well this thread got awesome. I unfortunately only have one anal related story to share, and I didn't even really get to do anything.
Last summer, me and the girl I was with at the time were drunk and just about to get in the shower, and she said something about wanting to pee on me, and I told her only if she agreed to anal.
She absolutely freaked out and acted like I was a total dick for asking, which I thought was ridiculous, cause for me, peeing on somebody is way higher up than anal on the totem pole of weird sexual stuff.