The rarely-awarded name for a powerful and monstrous dingus, a.k.a. penis. The Dingus Khan lives the life of a conqueror by giving women insurmountable pleasure and conquering their vaginas.
"So Hames12, did you hook up with that girl from the bar?"
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.