"Being Robbed" joke

Later one night, a woman was walking home alone when a man grabbed her and dragged her into the bushes.
"Help me!" she screamed, "I'm being robbed!"
"You ain't being robbed, lady," interrupted her attacker, "You're being raped!"
As he unzipped his pants, the woman took one look and burst out laughing. "If you're planning on raping me with that," she said, "then I'm definitely being robbed!"