A man's driving along the road when he passes another man, naked and chained to a tree - butt facing the world, arms round it as if hugging it. Stopping his car, the guy asks the unfortunate how he came to be in such a plight.
"Well" he begins, "I was driving along in my brand new sports car, very proud of myself, when I saw a young lady hitchhiking. I pulled up, asked her if she wanted a lift, and we got talking after she accepted my offer.
"After a while, things were hotting up, and she asked me to pull over for a bit of alfresco fun. I do so, and the next thing I know, I'm given an almighty whack on the head, and when I come to, I'm stripped naked, chained to a tree, my car, phone and wallet are gone, and there's no apparent way out of it!"
The passing motorist listens, nods sagely, then drops his trousers and says "It's just not your day really, is it?".