Ahh yes.. BL. That sweet shounen-ai juice and that spicy fresh yaoi hole.
BL stands for Boys love. Boys love is two(or more) guys doing things such as smooching.. And.. *ahem* Other stuff.
There are different kinds of BL. Yaoi,, The usually "Intense" one. Shounen-ai,, The sweet slow one(Mostly).
Let's just get this started.. Almost no one reads this anyway.
Goodluck! And please Enjoy^^~