I dont know about this whole thread.. Poeple who get really really good at something (eg certain programmers who can program viruses under 300 bytes, yes bytes), are that good cos they spend a helluva alot of time doing so.. it usually come at the cost of a social life... now if your an introverted person and dont really talk to poeple much, that's no big loss, and your getting better at what you do as well...
The other thing I've noticed is that men are ones who become obssesive about THINGS, like the net (look at most of the poeple in this forum for example)...
These maybe factors... but on a whole I dont really know (for a fact anyway)...