I have my pet trained to run to the lady's room and put her toy inside of her, you know, the one with the vibration and the remote control? All I do is say "go" and she's gone. One day I said "guess what?" and she says "what?" and I said "go!" A few days later, we're chatting and I say "guess what?" I wasn't going anywhere with it, but her reaction was instant full-on-attention and sexual arousal. Unintended, but I think it qualifies.