sentences:  Different hypotheses have been proposed to explain sexual cannibalism within the framework of evolution by natural selection, namely adaptive foraging, aggressive spillover, mate choice, and mistaken identity.The adaptive foraging hypothesis is a proposed pre-copulatory explanation in which females assess the nutritional value of a male compared to the male's value as a mate.Starving females are usually in poor physical condition and are therefore more likely to cannibalize a male than to mate with him.