A few years ago I commented on how pretty an especially lovely baby girl was in the grocery store and her mother responded by saying that they prefer people to tell her she's smart.
I thought, well, I can see she's very pretty, I have no idea if she's smart, and if she'd been a boy I would have said "handsome", but I respect that this was an evolving gender identification experience and it was educational.
I started to think about the whole nature of compliments, and how even comments truly intended as positive can be welcome or destabilizing depending on the context.
Masculine and feminine aren't terms that were invented for the purpose of identifying a group of people in a negative way and but if people feel confused or hurt by their usage I want to know and it might be good exercise to develop other way to define those terms, even to myself.