A beautiful body passing by, standing, or walking in front of us is, for those few moments, like a work of art.
We know nothing about the person in front of us, nor about their character, thoughts, life, or history, just as we know nothing about the models who posed for painters and sculptors.
What we perceive is only the form, the way they move, the way they dress, the overall harmony, and the absence of any vulgarity. These are the only elements that 'speak' to us. They are what create a purely aesthetic experience, a pleasure for the eyes.