It was several years ago, my sub were coming back to the house from an evening of dancing when I restrained her hands behind the headrest and was driving along exposing her. Needless to say I got pulled over by the police. Once he established it was consensual he let us go on our way. I thought the "evening" was over at that point. However, when we got home my sub was nonstop horny. We played for hours.

Word to the wise though: It could have gone way wrong if the Officer had been less understanding.