causative on emotion verbs (喜ばせる/困らせる/怒らせる)

The causative ~せる/~させる applied to emotion-state verbs to create 'cause [someone] to feel X' meanings — 喜ばせる ('make happy'), 困らせる ('cause distress'), 怒らせる ('make angry'), 泣かせる ('make cry'). The person made to feel X is marked with を.