Every woman knows that a guy like this can pretty much get away with whatever he wants. Drinking, cheating, swearing, beating, stealing, mooching, gambling. Anything.
You’ll do his laundry, clean his apartment, pay his bills, put up with him not working, shop for him, buy his groceries and beer, care for his sick mother, pay his gambling debts, bail him out of jail, and hire a lawyer for him. He can fuck your little sister at your birthday party, and you’ll still take him back.