Stabbing someone and then inserting ones penis inside the hole you have made.
guy 1: My dick is just to big to fit inside any girl
guy 2: Just go rugging. you can make your own hole
guy 1: good idea
Picking up a rock in each hand and then viciously bashing them together on either side of your cock to the effect of masturbating
I found some nicely shaped rocks and decided to have a 7 hour grocking session. After i finished my cock was violently beefing but it was worth it.