I'm asking this because a friend of mine told me that her parents both, on separate occasions, have told her the that she was conceived in her grand parents bed (very deliberately so), and the story behind it. It then turned out that another friend of mine knew where he was conceived, too.
I doubt there's a good story to go with my coming to be, but I think it would be kind of fun to hear it if there was. I'd be weirded out, but it would still be fun.