Crab trivia:The reason for the protection of The next door's Mr Wang.

In the world of fiddler crab, the best way for women to seek protection is to mate with the old king next door.

An Australian study points out that male fiddler crabs are happy to protect neighboring female crabs against invaders, in part because female crabs provide sexual love in return for sex.

The male crab will protect the female neighbor from being caught by other invading male crabs.