Previous research shows that men overall, in contrast to women, do not show a typical implicit in-group preference. One proposed explanation is greater interest in sex among males. If so, then gay males should show an implicit preference for males whereas straight males should prefer females. We tested this hypothesis using a modified version of the Brief Implicit Association Test on 38 gay and 65 straight males. The hypothesis was supported. As the majority of participants in previous studies on implicit gender attitudes are expected to be straight, this could contribute to the low implicit in-group bias among males.