Sexual cannibalism is when a female cannibalizes her mate prior to, during, or after copulation. It is found among many arachnid orders and several insect.
A year old nurse with a sexual fetish for cannibalism has been convicted of grooming a year-old girl with a view to meeting her.
Sexual cannibalism is a well-known example for sexual conflict and has many facets that determine the costs and benefits for the cannibal and the victim. Here.