When you do a good deed that should absolutely get you laid, but you're not trying to get ass at the moment, you put that in the pussy bank. When you're ready to go to Pound Town, you make a withdrawal from the Pussy Bank. Rinse and repeat.
The act of getting a wank but instead of it being with somebody's hand, its off a pussy. In other words sexual intercourse.
Can be also used to describe a person or just a thing you can say whenever you feel like it
I'm horny as fuck scan, I'd fucking love a pussywank.
Ah fuck lad, thats a pussywank