wow um wow. girls arnt dogs man. Perhaps its not that they dont understand, maybe they just dont care about all that techo geek babble. My fiance is the smartest person I know. She just doesnt give a shit about linux, unix, or whatever else i happen to find myself talking about. honestly.
Hell yeah, if a girl doesn't seem to be reacting to what you're saying she's probably bored out of her skull listening to you babble on about RAM, ROM, kernel panics and floppy disk drives (innuendo aside)...
Granted, there are girls who are as thick as two short planks but to be honest that's not because they're female, it's because they're just not the learning type... and don't forget that applies to males too...