I think whether it's bronze or milk, if you have a good figure. No matter what color it is, sweating after fitness is very sexy and charming. As far as my personal preference is concerned, I think bronze may be sexier if it is a boy.
Because I think bronzed boys will look more masculine. Many boys wear that melanin to get a tan. Like Louis Koo, he just has a bronzed complexion and looks very manly. It makes people feel that this boy is very safe.
If it's a girl, I think milk color will be sexier. After all, basically everyone thinks that girls will look better if they get something for nothing. White will look more elegant. If you happen to be in good shape, you are perfect and sexy. I think of Victoria's secret angel, He Sui.
He Sui, she's super white, that kind of milky color, and then she has a particularly good figure because she's a model. If she sweats a little after working out, I think she is the sexiest. Moreover, a person's skin color will look good after fitness, so no matter what kind of skin color, it will look good, more or less sexier than before.