Mary Martin as Peter Pan. I use her as an example because her version is pretty well known, but it could be any woman in the role, as a woman has played the character from the beginning. I believe Martin wore a chest binder as well, which would be an added reason for the rubes and prudes to throw a melty.
https://www.youtube.com/watch?v=VusJd4x3tI8
God forbid you ever had to walk a mile in her shoes, 'cause then you really might know what it's like to have to choose. - Everlast