Because you don't have time to lurk.
The Holy Grail of Hentai. The Master Sword of erotica. You ever want to see Samus and Zelda make out topless without furiously modding Super Smash Brothers? This is what you want.
Yaoi comes from the Japanese word "Yaoishi". Roughly translated, it means "to claw out ones eyes". You ever want to see Kraid and Link make out topless? No. No you do not.
Pros: Just keep telling yourself they're flat chested chicks.
Cons: They're not flat chested chicks.
Hey! You got your Yaoi in my Yuri! Well, you got your Yuri in my Yaoi!
Pros: You're not gay for liking it.
Cons: But... You kinda are...
To the heart!
Pros: And you're too late!
Con: You give love a bad name.
if you have to ask, you don't want to see it.
Pros: Aw! She's so adorable!
Con: But not when she's doing that to that guy...