A reference from Harry Potter for having the ability to talk to snakes. This reference is used when someone has mastered the art of not just giving a good blowjob, but giving the best blowjob ever!
Man, Becky legitimately gave the besthead ever! I don't know how she made my head spin like that, but damn she must've known parseltongue.
The process of masturbating into a dead snake carcass, only to realize that the snake is still alive.
Mate, I was in the bush last week and felt a bit horny so grabbed a dead brown snake to do the business and it came alive! I got totally parseltongued!
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.