Uhm I have heard of a dude in my school who had been with a lot of girls and then about three years after he graduated he came out of the closet so I can't really tell if its biological or psychological. Although I have heard that men who grew up in house full of women are more likely to become gay in the future. But I think it has nothing to do with any psychological bullshit, some are naturally attracted to men the same way others are naturally attracted to women.
Uhmmm so I got a new pc yesterday,its a HP pc with HP Motherboard wich includes an on-board graphics card (Intel HD Graphics 3000),well anyway I have pluged-in my other graphics card (Nvidia Gforce 9800 GT) and for some unknown reason my pc just won't detect it. I know that nothing is wrong with the Nvidia graphics card as it works perfectly on a different pc. When I tried to install the Nvidia driver,an error poped up saying no Nvidia hardware was detected.