I stopped going to works Christmas parties after seeing several drunken women attempting to remove the boxer shorts of a (willing, equally drunken) male colleague without removing his jeans first. They finally realised they were not going to manage it without cheating. One of the women found a large pair of scissors and thrust the business end down the front of the guy's jeans ...
Fearing that an accidental vasectomy was about to take place, I fled to another room where I was 'entertained' by a drunken colleague's unsuccessful attempt to seduce an attractive female co-worker with a display of his projectile vomiting technique!
A manager once came to try and drag me off to the Christmas do. When my girlfriend answered the door she found him wearing a large cowboy hat and peeing on the front doorstep. He looked up at her and slurred "Ssssorry, thish ish not what it looks like." She told him that it looked like a tiny penis with wee coming out of it and he gave a nervous laugh, and admitted that she was right! He then tripped over and fell onto the lawn, wetting himself in the process. It was hard not to remind him of that incident at subsequent tense project meetings ....