When my sister was 16, I was 14 (also a girl) figured out why or stallion would get stretch his cock out, we would tie his halter tight to the fence. Then we would take turns rubbing up and down his two foot hard cock. We found we could get him to cum faster if one of us rubbed from the center of the cock while my sister would stroke from the center of the cock to the tip. He would blow such large loads and we could sometimes get him to buckle on his rear legs form the felling. Yes we rub his hard cock against our clits later on for fun, but he was way to large to put in.