translation.en: The males are very picky about who they mate with, because they not only transfer sperm during mating, they also give the female something called a nuptial gift.
translation.zh: 其雄虫对交配对象非常挑剔， 原因是，交配时它们不单是移交精子 它们还给雌虫一种叫聘礼的东西。