Here is why men like lesbians:

1+1 = 2

Replace men with women, lesbians with Yaoi (sorry, not gay guys for most of us - we like our fantasies to stay just so) and there is your answer OP.

Peckers are ugly, even when drawn well.

I really don't understand how people can be attracted to the wang.

LOLZ -- if you are a guy, I hope you can asexually reproduce if you think all women are repulsed by 'wangs'.

I meant more along the lines of liking yaoi, it's two dudes playin stuff the burrito.There are no girly bits to entice you in. I actually know more straight chick that like the yuri than the yaoi.

The Yaoi question was actually kinda joking on my part. I kinda know where the lure comes from. I've been 16 years old and chokefull of hormones as well :p I've read some fanfictions that would make me sigh/be embarrassed today, and I enjoyed it.
And thanks for the Harry Potter warning there.

I still make more-or-less fanart today, but not based on characters of series or games, developed by the creators of that game. I make them based of characters that people roll in rpg's themselves, like D&D. It's fun for me to draw things, and people love it when they get a nice picture of their character.

Here is an unfinished picture I'm working on now, a shadowdancer (and yes, I know birhgt clothes is weird for shadowdancers)
http://www2.hku.nl/~hanneke0/nonweb/shadowdancer.jpg

If you like parody of fan-fiction, see the demonstration Strong bad puts out on Homestar Runner. By Clicking on this here link