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. He had a large number of nude studies in his broad portfolio of work .These displayed in a large black folder . Carefully marked with the date and name of the model .

His concentration on his work made conversation difficult at first. After a while, he chatted as he worked, a relaxed atmosphere prevailed.
She said being naked felt natural.
Undressing for him , behind a screen , was without 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 , she said , liberating.

She enjoyed good conversation , interesting reading suggestions.

I'm sure he sensed my excitement at seeing her nude in his presence. He made sure she was still undressed when I called to drive her home.

He showed me his work each week.
Remarking on her nude body in a flattering way, which embarrassed her but turned me on.