From what I can gather 'sissy' is a largely American term for humiliation via forced or coerced sexual feminisation or cross-dressing, like a sort of psychosexual masochism. Is that right?

Would the term then be inappropriate for those who desired or weren't forced into CD or feminised behaviour? Or for those who didn't connect it to sex?

What about someone who adopted femme characteristics as an internalised humiliation without being forced or it being connected to sexual activity?