So a good chunk of them have massive daddy issues no matter how hard they want to deny it. EVERY. SINGLE. 1. This is the primary reason they are not good gf material. However, if you can convince them to fuck (which usually revolves on being able to hold a conversation), you'll be absolutely set.
Bondage? You got it. Rimjobs and facesitting? You bet! Rawdawg? Of course. That bitch gets herself tested every month and is on every birth control substance known to women. Toys and pegging? They love that shit and think you're more interesting because of it.
What it ultimately comes down to is being able to have periods where you just hang out and treat them like a human being then immediately going full on kink. I was able to get 1 that had a body similar to post-pregnancy Mal Malloy but fucked it up when I thought I was gonna be serious with another girl only to break up with her a month later. When I tried to fuck my big butt slut she knew something was up. My cycle worked as intended otherwise.
Best places to look are Tinder. If they're poly then you have an even greater chance. Just claim ignorance and pretend like you wanna learn what poly is all about. Good luck!