When you ride a bike or do another such activity that while cause your penis to go numb. Afterwards you proceed to masturbate and it feels as though you are jerking off another man. This is due to your penis being numb.

When a wookie rips the arms off of one or more creatures or droids in order to give himself a satisfying hand job.

The act of jerking off with a severed arm or hand while zombie from the cranberries plays on loop.