Sometimes jerking off is almost more pleasurable than sex. Well only if the sex is mediocre or with an ugly chick. That's why you're on the couch getting ready to rub one out when your GF comes home early and catches you red handed. She's a little bit disappointed but her resilient nature makes sure that she's going to show you just how much better your cock fits in her pussy than in your hand. Surely you'll agree after you fuck her doggystyle for a few minutes.