Is it normal to dress like a slut at work to get better tips?

I'm a college freshman. I'm pretty much your average teen co-ed for the most part: sorta tall, long blond hair, blue eyes, slightly large boobs. Generally people call me cute. On a normal day, I dress my age, but conservatively--shorts and a t-shirt of tank top in the summer, jeans or leggings and a hoodie as it gets colder. I sometimes show a little cleavage, but never too much and while I might sometimes turn heads, I don't go out of my way to do so.

Last summer, I started working at a local roadside diner as a summer job, This place employs a lot of high school girls as waitresses, and most, including me, aren't afraid to show a little cleavage or show off their butt in short, tight shorts when they work. We know it brings in the men (a lot of our customers are construction workers and other blue-collar laborers, and we know they come for the scenery as much as the food).

At the end of the summer, since I would be going to school nearby, my boss asked me if I'd like to continue working at the restaurant. Since I tend to be a morning person anyway, I agreed to work the breakfast shift. One morning I decided to wear a pair of short spandex yoga shorts to work. This, combined with a tight fitting tank top, seemed to be a big hit with my customers that morning because I raked some of the best tips I ever got. That got me thinking and the next day I came in in a pair of volleyball shorts from my freshman year of high school and a crop top with no bra. The shorts were too small for me, so they just barely covered my butt, and since I opted to go without panties that morning, the seam up the middle of the shorts gave me a giant cameltoe. My nipples are also quite pointy, so the fact that I was braless was evident. I got a lot of positive comments from my regulars that morning and the tips were amazing. I was hooked, and I've continued to push the limits of decency ever since.

When I leave work, I go back to my dorm, shower, and go to class dressed like a normal 18 year old, but when I'm working, I love the thrill of being a slut. Is this normal?