St. Michael's not a woman.
Sede said that shorts were immodest and should be worn by no one, man, woman, or child.
Ok, he didn't mention angels!
Anyhow, the Church appears to have no objection to depicting an angel appearing as a man, dressed, what could be regarded as improperly.
Angels don't really wear shorts, though.
Indeed.
But surely a short skirt is even less modest than shorts, and we are exposed to images of an angel appearing as a man wearing what is, basically, a short skirt.
If it's sinful for actual men to dress thus, or in shorts, then why is it ok to show images of what to all appearances looks like a man dressed the same?
(I don't think it is per se sinful, but if one were to follow Sede's rules, one would have to find it so.)