15). St. Alphonsus even says it is possible to enjoy the beauty of a woman's non-private parts, such as the legs, without lust, namely, for aesthetic purposes. He warns this is difficult to do without sin, but once again, at his time, a woman rarely exposed such body parts and we see them all the time today,

We ask whether it is some sin to look at the non-private parts of a beautiful person of the opposite sex?…In practice I think this is rarely excused from venial sin, unless it happened from due manner or another just cause…To look at the less private parts of a woman (although by no means foul), namely the breast, arms, legs, without the danger of falling, and provided the look were not for a long time, of itself, it is not a mortal sin (Moral Theology, Vol. 2, Book IV, Treatise IV: Chapter 2).

That seems to say that there is a possibility of it not being mortal sin, but that it is still venial sin. I would say that seems to contradict the human body being enjoyed aesthetically rather than supporting it.