Gaahhhh just kill me now. I believe you're after a singles site, not swingers. And fuckin by god they don't read my profile before communication!
I find a good amount of girls that want to experiment or want girl on girl on this swinging site =p Plus overtly sexual housewives are always fun.
I think the geriatrics are worse than the single men. I did meet my unicorn on a swingers site though. Along with some truly amazing couples. <3
Unicorn = single woman who enjoys playing with couples and/or one person from a couple (with consent).
The original question was "Why do single guys get on swinging sites?" The answer is that many single guys enjoy fucking married women! There is just something about getting some of another guy's pussy that drives them! Also, when you fuck a woman who is already married, you don't have to worry about her wanting YOU to marry her. I have never been on that side of the swinging equation, but I do understand those who are. There have been so many instances in my marriages in which a single guy has come around and asked, either subtly or directly "Can I fuck your wife?" These single guys are necessary to the swinging scene if there are going to be enough men to fuck the women who are available. Besides, a single guy doesn't have a wife of his own to get jealous if he is out fucking other women!