>>5247339Cexroch females grow two protrusions from the abdomen you may wonder what they are used for? its a pair of "shovels" for burying the eggs in the sand where they are kept moist, generally hidden and distributes the crushing force when something steps on them.
but the male sort of went crazy with it, the genes responsible for the same segment as on the females protuberances went crazy extremely unstable and prone to mutations currently, generally most of them are used for grabbing onto the female while mating while not necessary at all it can help most are sort of useless
>pic related few of the many examples of male genital modifications 