i may not be that much of a geek (failed out of comp sci) but i do get laid, and often. in my social circle the only people who spend more time on a comp than me are the evercrack-heads ... but thats because getting laid alot cuts into comp time. in college i achieved this by limiting myself to only two computers and i set them up inside my closet with a little wooden stool in between. of course college students are pretty much required to have a comp on the desk so you can actually get away with having three, and that can be adjusted depending on the size of your closet/monitors/towers.
then, when you go out, dont wear cool shirts (trek, star wars, shirts with code on em) and by the time you get that freshman back to your hole ... as long as you keep the door closed ... shell have no idea about the skeletons in your closet.
as for hygiene ... i just add deodorant when i can start to smell myself.