Two guys are talking over a beer, discussing various sexual positions.
The first guy says my favorite is the "rodeo" position
The other guy asks what the rodeo position is and how to do it.
The first guy says, you tell your wife to get on the bed on all fours and then do it doggie style. And once things start to get underway and she's really enjoying it, lean forward and whisper in her ear - "Your sister likes this position too..."
Then try to hang on for 8 seconds.