The female bedbug has evolved a defensive counter-action. From observations of scars on the female’s body, the copulating position of the male often results in organ piercing in the region of her fifth segment. So craftily, if the male stabs the right hand side of the female, his spiked penis slides into a notch that directs it into a form of holding pocket complete with spermicidal cells produced by the female that can kill both unwanted sperm and microbes. The females that perform this technique of defence live much longer life spans and produce more eggs.