In which Superman discovers that Earths sun grants him a sense that had gone previously undiscovered by anyone:
successful backdoor entry causes a series of physical changes including Super Perspiration, the release of intoxicating [for humans] Super Pit and Crotch Sweat, Super Nipple Engorgement, Super Hard Cock (that would make companies that make penis enhancing products and pills jealous as fuck), Super Arousal, a Cosmic Sexual Awareness that attunes his body to the motions of whoever is pounding him, bringing their bodies perfectly in sync and making their sex look almost choreographed in its sheer intensity, and, of course, Super Spunk, which depending on how good the fuck was, could be quite voluminous (to the point that Bruce almost died trying to gulp it down bc it was far too much even for the Dark Knight Dicktective).