So a nun is taking a bath and hears a knock on the door
Nun: Who is it
Man: Blind man, let me in
Nun: Oh no, I am taking a bath
Man: Blind man, let me in
Nun: (Thinking) Well if he is blind he can't see me and there is no sin
Nun: (Action) Opens the door
Man: Nice tits sister, where do you want me to hang these blinds