The UT Law School has a big Fall/Halloween party every year, called (groan) Ex Parte.
It's a BIG deal -- everyone attends, in costume. Things can get interesting. Half-nekkid chicks, drunk professors -- good stuff.
When I was a 1L, we had it at the Opera House. It was relatively uneventful, but had a standout moment.
One of my classmates shows up. She was a bit freaky. Definitely sexy, but she was odd -- and fitting with that personality, she came dressed as a hot dominatrix. The whole show -- vinyl catsuit, spiked heel boots, a whip, and a leash. Which led to a collar. Which was around the neck of a guy. Who was wearing only the collar and pair of black vinyl briefs.
That would have been cool enough, but it got even better.
The guy was one of my fraternity brothers. He was a little embarassed. But he also explained that, when they got home, he was going to have hour after hour of freaknasty sex. So, he had that going for him. Which is nice.