Fights occur for dominance, in which the bulls lock horns and try to twist the necks of their opponents. As an act during rut, the males rub their foreheads in fresh urine or mud. They also use their horns to thresh and throw loose earth on themselves. The horns of older males get worn out due to rubbing them on tree barks. Expressions of anger are not typically observed. Dominant males may mate with multiple females. The courtship is brief, consisting of a penetration and one ejaculatory thrust.