A woman is taking a shower and hears a knock at the door. "Who is it?" she calls out.

"Blind man, Ma'am," comes the response.

"Oh," she thinks, "he must be collecting for some charity. I don't need to get dressed because he can't see me anyway."

Without covering up, she opens the door. The astonished man looks her up and down and says, "So, where do you want me to hang these blinds?"