This is not an easy subject..
I've recently been walking around in SL with keys on cuffs, hoping to get grabbed and played with, quite desperate, maybe too desperate.
Fact: wearing a dark opaque catsuit doesn't help, a transparent one does.
So, suddenly I got 'grabbed'... by a male avatar. Males are not my preferred play mates for several reasons, but... desperate me and regarding his SL age one could assume some experience, so why not give him a chance? He also didn't look like a meat bull ready for the slaughter house, if you know what I mean, so one could hope for some intellect.
But oh dear! Before I got the chance to even start a chat about expectations and stuff, I was fully gagged and my IM were completely (!) blocked. No chance even to point him to my profile, where it says that's not to my liking. However, I had been locked and put in a cell finally, so I held my complains to myself (not that I had much choice, except the "cheat out of RLV" choice, which I really, really hate) and decided to give it a week or so. Not seen this man on since.
Things only got worse from then. This second man was convinced I was going to be his property and slave, and nothing I said could make him see this was not going to happen. Nothing.
I still don't care what colour or sex or whatever is the person behind the keyboard, and honestly, I even prefer not to read that in a profile, but my first criterium from now on will be a F/X avatar.