The female praying mantis needs nutrition before laying eggs, and the male praying mantis naturally becomes the most available food after mating. So it's true that the female praying mantis eats the male. However, some scientists have indeed observed for a long time that the female eating the male is not an inevitable result. There are more cases of male praying mantis successfully escaping after mating. It can be seen that the sacrifice made by the male praying mantis may not be as voluntary as people think.