The reasons why L is UKE:
1. He only thinks about Kira and criminal cases
2. He doesn't have any sex experience (even he's 25), in fact he's never been in relationship.
3. When Light is around him, he acts very submissive, child like
4. In episode 25 DN anime, L submits himself by wiping Light's foot, it means he doesn't mind to be in uke position
5. Anyone who loves sugar and any sweet stuff is definitely UKE imho ^_^
Every members can contribute anything.. From Doujinshi and Fanfiction to Fanart! Everything is welcomed, as long L is UKE ^^
As long you like uke_l you are welcomed in this community.
And any rate 18+ doujinshi must be locked ( Only members can see it)
L doesn't want to be on top what he needs is love and hug from his seme, Light!!!