Is it just me or waitresses usually have really nice butts?

I mean any given waitress/hostess anywhere (in the world probably too) in any restaurant, although especially chain restaurants.

I don’t know if it’s the uniform they have to wear that makes their butt more shapely – still, it just hit me the other day at a semi-fancy restaurant. Is it just the uniform or is there actually some slight bias restaurants have when employing waitresses? Haven’t you ever thought about that or noticed it?