When my wife posed for an artist. After the second two-hour session she said she felt comfortable and forgot about being nude .

The artist was much older than her and very experienced. His concentration on his work made conversation difficult at first. After a while, he chatted as he worked, and a relaxed atmosphere prevailed. She said being naked felt natural and took to the routine of undressing for him without any anxiety or embarrassment. He was 30 years her senior, highly educated, cultured, well-mannered, and had led an interesting life.

I found it a turn-on seeing her nude in front of him. She didn't find it erotic but liberating. She enjoyed a good conversation and interesting reading suggestions.
I'm sure he sensed my excitement at seeing her nude in his presence and made sure she was still undressed when I called to drive her home. He showed me his work each week. He remarked on her nude body in a flattering way, which embarrassed her but turned me on.