We know the interaction between behaviors and hormonal changes that cause this. If a female mates too readily, means that she probably was courting and mating with another male. Her mate will often abandon her if this happens. Other Mechanisms in Sperm Competition A. Physically removing previous males sperm. Females will multiply mate.
Some sharks use a seawater douche.
The intromittent organ has two openings. One delivers sperm, the other a high pressure jet of sea water. If a male detects his mate with another male, he pecks at her cloaca until she physically contracts it and ejects a droplet of sperm-containing fluid. Then he re-mates with her. If a male leaves the female unguarded, he can try to reduce the chance that she will mate again.