Examinations of gay and bisexual men's (GBM) perceptions of intimate partner violence (IPV), including their perceptions of events likely to precipitate IPV, are lacking. Focus group discussions with GBM (n = 83) yielded 24 unique antecedents, or triggers, of IPV in male-male relationships. Venue-recruited survey participants (n = 700) identified antecedents that were likely to cause partner violence in male-male relationships, including antecedents GBM-specific currently absent from the literature. Chi-square tests found significant variations in antecedent endorsement when tested against recent receipt of IPV. Linear regression confirmed that men reporting recent IPV endorsed significantly more IPV antecedents than men without recent IPV (beta = 1.8155, p < .012). A better understanding of the IPV event itself in male-male couples versus heterosexual couples, including its antecedents, can inform and strengthen IPV prevention efforts.