Let me see how great the barriers to sex is to me.
First of all, I don't know many people, and don't meet many people. So finding anyone through my contacts (though I haven't tried) would possibly/probably be difficult.
Then there is the fact that I'm generally not interested in going to the usual places where people meet. I addition to that I never have any place like that to go to anyway. Not that I regard this as too much of a loss, as I don't imagine I would meet anyone there in any case.
Added onto this that I probably only would tolerate a minute percentage of females, and only really would feel compatible with a tenth or less of those again. In addition to the unfortunate thing that most of those I'd want to meet usually don't have many friends or get out much, so finding them will prove difficult no matter what I do. I'm also a relationship kind of person, and sex is secondary for me (that is not to say I don't like anything sexual, in reality I absolutely love to talk about and do stuff like that. But I prefer fewer partners and closer relationships).
And to top it all off, I'm terrible at initiating contact and I'm a very passive person (even though I don't want to be). Which I hate considering there's so much I'd love to do.
Which is a shame as I regard myself as a good-natured, kind, and easy person to talk to, and I have a strong emotional capacity which is severely underused.
I realize now that this went in the relationship direction.. but.. In short, I'm sure there is someone out there for me, but finding her will surely be a near impossible endeavor.