I am so afraid of disease that I wasn't/am not a casual sex type of person. Unless my partner/FWB are in agreement to be monogamous (sexually) lol.
It sounds odd, but I has worked. Now, that particular friend ended up wanting to marry me but yeah, it worked for a time.
But mentally, I couldn't separate the thought of disease from random sex, so it would be a turn off. Folks yell condoms, but there are things that condoms can't prevent and a sistah aint trying to get creepy crawlies from no one night stand. lol.
However, I see nothing wrong with it if you have an understanding of the boundaries and rules of engagement. Fellas need not be hypocritical though because if not for the ladies having casual sex, who then would you have sex with? lol So if she a H*e than you are as well.