When Langris tells Finral that he's cursed to be a playboy who's always flirty, it turns out he's actually right. The activation for the spread of the curse is asking somebody to help him break the curse of flirting. He happens to ask Asta and Yami. And then it spreads. ALTERNATIVELY: "What's up, Prickly Princess?" Yami smirked and raised a teasing eyebrow, before uttering the absolute stupidest suggestion in history. "Why don't you and me head to that toilet stall and take care of some real rough shit in there?"