Men: do you check out all women's bodies or just women that are what you prefer in the looks department?

Men: i am just curious if you look carefully at all women’s bodies or just women that are what you like in the looks department?

For example, if you like large women and you see a skinny woman, will you still check her out or will you look beyond her? or if you prefer young women, but you see an older woman who is attractive, will you observe all of her details or not bother?