Story time!
15 years ago I was travelling on a greyhound bus from Minneapolis to Eugene. Somewhere near Butte a guy got on and sat a couple rows behind me. Over the next several hundred miles he provided the sole entertainment by telling everyone who would listen about how hot his girlfriend was, how great the sex was, etc. etc. After hours and hours of exhaustive detail on this subject, someone finally asked him "so where did you meet your girlfriend?"
....
"At a family reunion!"
Turns out she was his second cousin or something. Much hilarity ensued.