Mindfuck Paradise

60 years ago, a strange phenomenon swept over Earth, sparking its transformation into a world of free sexual use. The phenomenon turned humankind into a sexually-focused society, and a wide array of mutations have created new groups of humans with features and capabilities far outside the previous norm.

All humans are essentially immortal; their aging slows to a near stop around 30, only progressing if they want to become older, and they'll regenerate from any injury - even total destruction - in a matter of days. Shortly after the phenomenon, an unexplained side-effect was discovered. It's become possible to literally fuck someone's brains out, and filling their head with cum turns them into a cock-obsessed idiot until their head drains and their brain regenerates, over about two days. Brainfucking has become more and more common in the years since the phenomenon.

Due to the social effects the phenomenon brought on, sex is much less of a taboo. Underage sex is still illegal and immoral, but and public sex are both widespread, and it's no longer considered necessary to get consent; having sex with someone against their will is seen as rude. Since brainfucking is a much more personal and impactful act than regular sex, asking for consent before brainfucking someone is considered polite; brainfucking someone against their will is obviously incredibly rude.

You've spent your whole life in this world living a basically normal life, relative to the world around you. Who exactly are you, though, and where do you find yourself in this life?