Two cowboys are sitting in a bar. One says to the other: " Have you ever tried the rodeo position with your wife?"

The other guy says: " I never even heard of it!"

The first cowboy says: " It's easy. You mount her from the rear, reach around and cup her breasts. Then say " They feel almost as nice as your sister's"

"Then see if you can hang on for 8 seconds".

The swedish rodeo is a bit harder I guess...
Same joke in essence, though. Heard this one a number of times at the university...

"Mount her from behind, lean over and wisper in her ear, I´ve got HIV.
Then try to hang on..."