In his paper, "In Defense of Disco" (1979), Richard Dyer claims eroticism as one of the three main characteristics of disco. As opposed to rock music which has a very phallic centered eroticism focusing on the sexual pleasure of men over other persons, Dyer describes disco as featuring a non-phallic full body eroticism. Through a range of percussion instruments, a willingness to play with rhythm, and the endless repeating of phrases without cutting the listener off, disco achieved this full body eroticism by restoring eroticism to the whole body for both sexes. This allowed for the potential expression of sexualities not defined by the cock/penis, and the erotic pleasure of bodies that are not defined by a relationship to a penis. The sexual liberation expressed through the rhythm of disco is further represented in the club spaces that disco grew within.