Don't really understand why the skills name is "slut", when all she did was masturbate. Or does japanese have the same word for "slut" and "masturbation addict" (or whatever you want to call it) perhaps?
@Siikalahna According to Anime/Manga/Hentai logic, any woman that enjoys sexual acts is considered a "slut". A "pure and refined lady" would never take joy from such an "uncouth" act.
@Lazytyke
She doesn't "enjoy sexual acts" it's well past that. She spent 9 days doing nothing but masturbating.
You might say "it's nothing we all here haven't done before", and you'd be 100% right... Though that just means our slut level is also quite high