I'm confused wih this?

some people are not attracted to any one but its like if they crushes on some one then they must of liked there body cause u don't just crush on some one with any kind of body. There for even though they don't get turned on they are still attracted to people .its like ual attraction comes before emotcionall attraction .u have to like how they look to want to date them.U only crush on people with the body type that u are a attracted to . so please explain how an aual no ual attraction just because they dont turned on?