I mean, it's up to the individual to self-identify, but usually it's things like frilly lolita styles, maid fetishes, and sexual subservance. These are not problematic in themselves, but unfortunately it normally means infantilization, misogyny, and race fetishization.

The last is utterly unacceptable, but the first two problematic elements are so because oppression towards women starts with male attitudes towards women and what a woman is.