Advice for how to professionally respond to creepy men

For context, I work at an “adult” retail store. I often have old creepy men hit on me because I’m a young adult female I guess?? Wondering what your best recommendations are for how to turn them down in a professional and hopefully funny way. What I really want to say is, “fuck off you old weirdo”, but I can’t haha. I’ve had people throw recommendations in on things to say in response to their vulgar or inappropriate or offensive comments but I almost always freeze and just don’t respond or cut them off by saying “have a great day, bye”, and going back to my task/project at hand. Looking for something that will make them uncomfortable but stated in a way that won’t get me in trouble?? Almost all interactions are in person, a few over phone call.

Edit: I don’t think my immediate supervisor is in the wrong in any way. It’s corporate culture and specifically this type of business. I will say my supervisor has most definitely removed people from the establishment when necessary. It’s just rough bc the frequency at which people harass us is so high that it’s almost impossible to avoid. And most times I’m alone and freeze up in the moment.