CoreAdult.com is looking for erotic short story writers in all niches (Lesbian, Gay, Orgy etc.). Send samples, and questions, to Dee: firstname.lastname@example.org
Bi sexual stories needed at Three Pillows. Stories should focus on two males with one female. More specifics in the writer's guidelines.
Tit Elation is looking for erotic stories for women -- Hetero & Lesbian. Stories should have an emphasis on foreplay and courtship. Read their guidelines here.