After a mysterious phenomenon, some people, approximately 60% of the population began to develop strange abilities.
You could call them superpowers, inhuman abilities that could grant an advantage to the person, but weren't your typical as throwing fire, laser vision or flying, it had a more... Perverted and horny twist. People called them kinky superpowers since all of them were relate to some kind of fetish, some people could grow many body parts including genitals, some could turn into their opposite gender, some could willingly transform into the famous anthropomorphic animals known as furries, others could vore any thing no matter how big the thing was, any fetish you could think probably already was someone's superpower.
Eventually was noticed that these powers started to develop on the puberty, as teenagers explored their sexuality and awaken their strange sexual desires. The powers seemed to be linked to the person's sexual fantasies, since a study revealed that people with these abilities had a kinky superpower related to their most desired fetish (such as the previously mentioned as multiple limbs, gender change, furries, vore and waaaay more), while people with little to no interest in sex seemed to not have them, with a few exceptions.
This didn't cause any major problems in society, more than the porn industry skyrocketing their sales and many people trying many weird things on their beds during their private encounters. The criminality rate was affected too but didn't grow a lot, since now criminals somehow used their abilities to do their mischievous tasks.