This line of thinking is dangerous. Deacon, forgive me if I am misunderstanding your comment. I probably am, as this topic hits a nerve.

… but just in case, I am not, well get ready for my rant.
The OP is not talking about the Sistine chapel, he is talking about someone’s wife, mother, sister or daughter. The Catholic Church does not teach that it is fine to look at naked women provided you are “appreciating the beauty of her gentle curves”.

I hope this is not what you are implying. Men don’t get to violate the rules of modesty just because they tell themselves they are not lusting. Is it OK for a group of grown men to walk in on someone’s daughter or wife while showering? As long as they say, hey, don’t worry, we’re not lusting, we’re just appreciating your grand design of the feminine, she should be OK with it? Would that make everything right with God? Of course not. Men who keep parroting this grave error sound like they are just trying to come up with excuses to unwrap gifts that don’t belong to them. The parts of a woman’s body that involve sexual reproduction are an exclusive gift to her husband and only her husband. Breasts are also (for a given period of time) a gift to her babies. Men taking pleasure from women they are not married to are trespassing where they have no right to go. It is a huge deal to violate something so Holy between two married people.
I think screwtape must have come up with the idea of some men magically having immunity from concupiscence and so now they can look at naked women just so long as they label certain naked pictures, tasteful and therefore not porn, then they can continue deceiving themselves. Meanwhile what message does this send to women and little girls?
I once walked into a room and on the tv there were completely nude women reading the news. They weren’t doing anything to incite lust. Reading doesn’t meet the definition of porn so does that mean there is nothing wrong with it? Can we all hear the news and enjoy the gentle curves of God’s design? Of course not. A woman is not an art object for men to enjoy even if they aren’t lusting. Unveiling that which should remain veiled until marriage is wrong even if it technically isn’t defined as porn.
The only time someone can look at the naked body of the opposite sex is in marriage. After that exceptions are made if the principle of double effect comes into play ie medical necessity, woman giving birth in elevator alone with man not her husband, forensics etc.
If someone thinks it is fine to use the sense of sight to see a woman unclothed (provided you are not lusting), then I guess you could make the argument that as long as you don’t lust, you can use the sense of touch to feel a woman’s gentle curves in order to appreciate her beauty! Extremely perilous line of thinking.
There have always been Christians promoting nudism throughout the ages and the Church has rightly declared them in error. I am not accusing anyone here of that, but just saying this is what follows from being deceived. It is bad fruit.
To the OP, Bishop Fulton Sheen gave a talk and said, “love of nudity” was one of the signs of the demonic. Perhaps, spend some quiet time after Mass in prayer and talk to Jesus and Mary about it. After the fall, God clothed us for a reason. Don’t let the nudists and naturalists convince you otherwise. They will take you down a dark path. Peace.