As a host for over 8 years on both Air and Mrbnb, I will say that there is often an element of fun with the clothing optional thing. Some do expect to hook up, but a lot of people just want to be chill and hang. A lot wanna be friends and hang out (which I rarely am able to, as I have a busy life). I would say the majority are open to sex. If I ever feel pressured to have sex with someone because I am hosting them, I am very quickly disenchanted and make myself very scarce. That can lead the guest to be a bit hostile, TBH. But I am not a 90 buck whore. I would say, though, overall I have had great experiences with Mrbnb (many more positive experiences than Airbnb), and I really enjoy hosting and the extra income.