It doesn't help that along with those things, I'm not outgoing, and I erect high social barriers for myself. The notion of talking to someone out of the blue scares the living bejeezus out of me, unless there's some decent amount of context/background I can grab onto. As far as the social barriers go... some of them are because I have a nasty tendency to wander over borders without meaning to do so, and have to be extra careful. This sometimes manifests in odd ways; like, while I prefer to greet people by hugging them, I ain't gonna do so to somebody unless they've made some explicit intimation that they'd actually want me to; usually, this means that they have to hug me first. In a related sort of way, if I hear about parties or "come over to my house" or much of anything else social, I definitely wouldn't go - or even mention the subject at all - without some sort of explicit invitation first; this especially sucks when lots of people talk about this big event they're going to that isn't an open invite.
I don't know if this is all real weird, just me, or something else.