Sometimes I compliment them.
And sometimes I judge myself afterward, like “Am I promoting superficiality? What if she was perfectly fine and now she feels good about her outfit and associates the good feeling with clothing?”
Or, “Omgosh what am I wearing? If I’m dressing all nebach [I use a different word in my thoughts – “scrubby”] then will she be insulted when I say that I like her style of clothing because maybe she won’t want someone like me to like her clothing?”
Actually thank you for now I see that at least the second thought is really probably not an issue, since she probably won’t even remember me but more of how she felt and what I said.
I don’t think things are expected of you other than genuinely complimenting a bride on her wedding day.