Two fantastic The L Word fics that are related -
celeria's
Wonder Why You Haven't and
thisredrock's
Think About Direction. Dana/Alice, set during episode 2.05.
In The OC there's
Action Figures by
miss_begonia. Seth/Ryan. Seth wishes they made Ryans in action figure size. And there's also
Seth/Zach (oh, yum, oh yes) from the same author. Aaaand
Unwritten by
amerella, which is gorgeous Seth-fic. And also
Golden Boy by
easywaffle69 which is Seth/Ryan but Marissa-centric, which is just perfect.
Queer As Folk (US) -
Irresistable by s.a., 'cause it describes three relationships perfectly.
And in Sweet Valley High, there is
Bad by
kannaophelia. Amy/Enid. You know it makes sense.