I picked up a hooker

One day a guy picks up a hooker. He takes her to a fleabag motel, and they get undressed and get into bed. He gets excited and they go ahead and start messing around. He puts his knob into her and commences to screw her, when he notices that her insides are rough, and are scratching the daylights out of him. Guy says,”Baby, your pussy is killing me. What’s the problem?” She replies, “Excuse me for a minute.” She goes into the bathroom, then returns. They start to have intimate relationship again, and he notices it is smooth, and even quite lubricated. They get done, and he asks,” What happened? It was so rough, and then when you got back, it was great. What did you do?” She replies, “Oh, I just picked off the scabs.”