This is a base joke.
Three in the morning and the Madam hears a bang on the brothel door. She gets up and looks through the little peek hole to see who is there. Seeing nowone she retires. Again a loud bang on the door and she goes and looks again. Still no one there. She is about to go back to her bed when the door shakes with another bang. This time she opens the door and finds a man with no arms or legs sitting on the steps.
She asks gruffly "what the hell are you doing ?" to which he replies " I want a women"
" And just what would you do with a women" she counters.
" I knocked on the bloody door didn't I?"
skeets