i'm going to only explain this once, so please read carefully. it's very possible and if you don't think it's possible then you haven't met or been around these type of women, or people for that matter.
how do i know it's 500+... well, in the last two decades or so, she has been part of a private swingers club that my wife and i are still a part of today. since the day we joined, this club has always had 2 parties every week and has not missed a beat. this woman has been to just about every party because my wife and i have done the same. this is how we became friends because every time we showed up, she would approach me for a fuck. after a while, you might as well become friends because we always saw each other at the meetups and it's good to network. she has introduced us to some really cool people over the decades.
as a single woman in a swingers club, they will EASILY fuck at least 10 or more guys per party. remember that fucking at a swingers club isn't 45-min love sessions like most normal people, it's a quickie fuck that last 10-15 minutes, if that, and men do form lines or join in on gangbangs. my wife was picky to some degree so she'd hit 5 or 8 per party and i would hit 3 or 4 if each time i came or more if i didn't. we'd hit another 1 or 2 together and call it a night.
so do the math, 52 weeks X 10 = 520 per year... let's say she only goes to half of the parties then it would be 26 x 10 = 260 per year. it's been at least 2 decades and 10 is just the average. i would say she's doing 15-20 per party because she is attractive physically and face-wise too. does it make more logical sense now? we're not even counting the bodies that she collects on her own outside of these parties.
she's still a good friend of mine and i still fuck her from time to time. she's still single, successful in her own right, not interested in a relationship or marriage or kids. takes incredible care of herself, incredibly serious about birth control, and still hot as fuck. her libido is higher than mine or my wife's and my wife's libido is off the charts. if you met her on the street, you would not think she was a nymphomaniac slut.
hope this helps. to some people, this is incredibly hard to fathom and only something you read in fiction novels but welcome to my world.