I went to a Star Trek convention once and on the opening evening there was a small party, so of course we all went to have a couple of beers and see people dressed for the 24th century. One of the women who was with us all of a sudden looked up and said “My pants are vibrating – should I be worried about this?”
There was no innuendo intended, her cell phone was set to vibrate and she was receiving a phone call from the baby sitter.