A lot has been made of the conspicuous absence of sex in the behavior and dialogue of Dionysus. It is Pentheus who seems obsessed with this element of the dionysiac experience. And indeed, it is this obsession that leads to his death. Before the opportunity to spy on the worshippers arises, Pentheus, though in the wrong, is strong and steadfast in his opposition to Dionysus.
However, Pentheus is actually dionysiac by nature as, of course, his blood would dictate. Failure to repress, or fully submit to this leads first to the loss of his authority and, ultimately, to the loss of his life.