Ever opened the door when naked (full or part) or had a door opened on you and the person was naked (full or part)?
I quite often just wear undies or undies and shorts when home on my own, so I will just go to the door in that. To date I've never had a beautiful woman outside the door. 8-)
I've never had anyone (not even a lover) open their door to greet me naked.
Often I'm just nude totally at home but usually keep some 'emergency shorts' close-by just in case. I'm not sexually attractive so nobody needs to see my bat and balls.
I suppose that for a woman, her breasts are considered a sexual attractor, whereas for a guy, generally his boobs are not. So there's a difference.