"Sex (I'm A...)" is a song by the American band Berlin from their second album Pleasure Victim. The song was co-written by group members John Crawford, Terri Nunn and David Diamond and sung as a duet by Crawford and Nunn.
Released as the album's second single in February 1983, the single, influenced by Donna Summer's seminal "I Feel Love", became a cult hit on American radio and brought the group into the mainstream. Despite the significant attention, the song's racy lyrics resulted in its being banned from several radio stations. The single peaked at No. 62 on the BillboardHot 100 for two weeks in late March and early April 1983. The song was also the first single release from the band's new label, Geffen Records.