South Park - Season 13

Kenny takes his promiscuous new girlfriend, Tammy, to a Jonas Brothers concert with hopes of receiving oral sex from her. Instead, the band gives them purity rings as a pledge to practice abstinence. Kenny becomes dull as a result and ceases to spend time with his friends, which deeply concerns Stan, Kyle and Cartman. They attempt to confront the Jonas Brothers at a televised appearance and find out that a greedy Mickey Mouse is using the rings as a scheme to sell sex to little girls without invoking the ire of parents. The boys trick Mickey into revealing his devious intentions in front of the crowd, which turns on him. Kenny discards the ring and receives oral sex from Tammy. He consequently contracts syphilis and dies.