Totally my thing! When I was in high school I use to pair up anime characters all the time. University it was Harry Potter characters. Now it's OC's of mine and my friends from D&D. ^_^ though I don't write those out or tell anyone really.

As for why it is... I don't know. But I do know that my ex girlfriend (a lesbian) also enjoys slash. In fact, it's her favourite porn/erotica! Since she hit puberty. In fact, come to think of it, many of the lesbians I know like slash or yaoi.

Factor that in?