Imagine being a passerby in the seconds after Hulk breeds Spidey. As that gamma cock slides out of that irradiated spider-hole, some of the semen splashes the person walking by.
Later that night at a club, that person finds himself in a superhumanly aroused state, and his engorged pecker keeps tingling, alerting him not to danger, but to holes in his vicinity that are capable of handling a gamma semen enhanced pecker.
