While having sex doggy style, the male very subtly wraps the female's hair (preferably long) around his hand. However, the stimulus for the bucking is not an insult from the male, but as Buckin Bronco purists will attest, when the rider's friends burst into the room (from a closet typically) ringing cow bells and cheering wildly.
See that skinny dude over there. Last weekend, at a party, he pulled 12 seconds on a nasty little Buckin Bronco.
6👍 10👎