The main speaker goes all out to be funny, and the "straight man" props him up. Otherwise, the two will be equally humorous and engage in a combative exchange.
要不是逗的人使出十八般武藝，捧的人在一旁撐腰，稱為「一頭沈」；就是兩人勢均力敵，互相辯論，稱為「子母哏」。