Either you are not female, or you cannot empathise with teenaged girls about bra shopping.
"Do you need any help", "yes I'm looking for a bra", "Bras are over there," "thanks". or more likely with an embarrassed teen girl "do you need any help" "no thanks" "okay".
"Do you need any help"
Already at this point the behaviour of a male person approaching a teenaged girl in a bra section has crossed the line of appropriate behaviour.
or more likely with an embarrassed teen girl "do you need any help" "no thanks" "okay".
Oh... you DO recognise that the very simple interaction is likely to embarrass the teenager! Thanks for confirming this.
So, you understand that the teenaged girl is HIGHLY LIKELY to be embarrassed by the interaction. Yet, you cannot acknowledge that it was NEVER appropriate for a male to approach her in the bra section AT ALL.
You don't see your very own inconsistency in the position you just posted.