Why are earthworms considered to be hermaphrodites?

This isn't a real advantage to an earthworm. This is because they are not able to reproduce by themselves. They may be hermaphrodites, but it doesn't help them much. ADVANTAGE- when they have "sex" with another worm (touching the clitellum together), it doesn't matter where exactly it touches, as long it touches they are able to reproduce. That is the only advantage. (Which I think is kind of stupid)