It's always an accident, but it has happened. In the very first session of the campaign the three characters present got glued down to a seat. We chose to cut ourselves out of our clothes. My character, as a noblewoman, had on layers and layers. She cut the outer layer and got up. The men, on the other hand....
Recently a character used a "god call" item. When he was in the gods realm asking for the favor, the god (of practical jokes) required him to do several things, one of them being to strip. He appeared back before the group still in his altogether.
Just last night, our party was attacked as we were sleeping. One of the male characters ran and stood astride my character to block the assassin about to kill her. (I was awake but hadn't had my turn yet). The men in our campaign wear kilts. What a thing to wake up to.