Obedient Sperm Receptacle - A human who lets people walk all over them and still thinks

A human who lets people walk all over them and still thinks they're getting the best deal.

I stayed with my ex even after he stole my car and my dignity.

I took that job even though I hated it and the boss was a total pain.

I kept dating my girlfriend even after she broke up with me and left me in the dark.