Two cowboys are out on the range one starry night talking about their favorite sex positions. One says, "Ever have rodeo sex?"
"Ain't heard of that one," says the other cowboy. "What is it?"
"Well, you get the girl down on all fours, and you mount her from behind. Then you reach around and cup her breasts, whisper in her ear, ‘Boy, these feel just like your sister's!' and see how long you can hang on."