Hi, I'm 31M. I'm writing from the future to tell you this young man's jealousy has absolutely nothing to do with you or your work and everything to do with his own insecurity. If you weren't working as a bikini barista he'd be mad about you hanging out with male friends, or something else like that. Time to have a hard talk about how his insecurities are not your problem (boy, therapy sure is great), or end it. Good luck!

I'm of two minds about this. (Not the s*x worker adjacent part thats already a deal breaker)

If my foid is getting hit on by gross dudes all day as a normal bartender, I may assume she has developed some sort of resistance, an immunity, and probably will not fall for their tricks.

On the other hand you have a quiet mousey conservative girl who doesn't party much. I think I'd be more insecure about what she'd do in the event of some PUA putting the moves on her in the rare event she's out with the girls or whatever because it's a wildcard, nothing is proven

Probably ideally you want some happy medium where she's kinda used to it but doesn't field dudes for a living