cluelusshusband...you are confusing me too much, I am lost who is shirtless and who is not shirtless and who looks like a woman and looks like a man.
The underlying principle is simple:
1) never to expose in public the lower part of the body (genitalia)
2) not to expose top portion of the body for both men and women. However if it is very hot: woman can wear bikini top with a skirt and a man can be topless
3) In the park: men can be topless and women can have a bikini top.
4) In the event of a man having characteristics of a woman, he should not be topless.
In the event of a woman having characteristics of a man, she should not be topless, either.
These are the underlying rules.