Darla Delights
Many mutants had strange powers, and Darrel here was no exception. Whenever he got really horny, he would change sex into a raven haired beauty with five times the normal sex drive of the average woman. This was not all. Once he had sex with a male, he would suck the maleness out of them, giving them the orgasm of their life, then leaving that be their last male orgasm, as the would irreversibly be transformed into woman afterward. This in turn would allow her to change back to her regular self, Darrel. The process would repeat, whenever Darrel would get horny once more. Essentially Darrel, though normally a male, had never really had sex as a man, since the horniness would always change him to female. He even named his female form, Darla Delights. The sex was always delightful, and the resulting male transformations turned out rather well, as most of the men she was with turned into beauties much like herself, even possessing high sex drives like hers and for men.