Not a study large enough to be of any scientific value, but these are some observations from a lifetime of dating both men and women.
When you've met a new partner, wether short term, or other, finding out their kinks, and fetishes can be quite rewarding, and frustrating. Neither group tends to just jump up and tell you about them, but-
Women seem to be much more forthcoming. Women have admitted things to me before we even got to the bedroom. They may say 'Before we go to bed, you should know, I really like......' Toys are really common with lesbian sex, and sometimes a woman will just bring some favorites the first time. Watersports, enemas and a host of others, are brought up early in the relationship. Why hide something you really like? I've taken a shower with a woman the first time we were having sex, and she's peed on my leg, and asked if that was a turn on.
Men have a much harder time coming out about the things they like. They might think they will scare us off if they admit to using a butt plug during sex. In fact, I often discover a kink well into a relationship, and sometimes it's completely by accident. Enema equipment under the sink, their laptop left open with a bondage site up. (The open laptop is also sometimes not 'an accident' but a man's way of showing you something) Men seem to have the hardest time with same sex desires, and may not tell you ever. In the old days of magazines, I could tell a lot about a man by his collection, then 'surprise' him with something he likes, as if it were my idea! I found a stack of feminizing, and strap-on material in one guys apartment, and ran out and bought a strap-on. (By the way, I don't snoop, honestly)
I have never kicked a man, or a woman out of bed because they admitted something to me. It may not be to my taste, and I will tell them, it may be something I've not tried, and I'll try it, or we may discover that we have a mutual love for something, and it makes our relationship stronger.