Not *really*, because I know that he wouldn't do that with The Weight Of Patriarchal Oppression behind it, but the term does still ring those kinds of alarm bells for me in a way that "boy" doesn't. Like girl is infantilising and removing of agency, but boy is quite neutral in that regard.

(A & S are a case in point - she calls him her boy and that totally works but I can't imagine him calling her his girl.)