How to deal with 16 year olds sexually harassing me as a 26 year old?

I work at a tuxedo place. During the prom time we get a lot of teens coming in for fittings and I notice it’s always so awkward. The ones from schools in the city are respectful but the ones from private schools are straight up disrespectful, making comments about my ass and flirting with me. Why do they do this? I can’t really say anything because most of them have rich parents who’ve been customers for decades and frankly sounds dumb to say an underaged boy is sexually harassing me…

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I appreciate the feedback from everyone. I probably will just end up finding another job there’s not much I can do about it even mentioning it to my manager she just laughed it off
How to deal with 16 year olds sexually harassing me as a 26 year old?
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