How to ask a friend that has known you for years if they would see you naked to see if your body is ok or not, I am 19m they are 18f and pansexual?

We recently became good friends again last year and this year and she says she thinks I'm a nice person, said so to my mum as well. She is pansexual so there is no risk of her liking me.
She does art so she is used to drawing humans, maybe she'll be ok with it? I am 19m, had to do my senior year over two years and just graduated yesterday, I beleive they are 18 as they drink so yeah.

How to ask a friend that has known you for years if they would see you naked to see if your body is ok or not, I am 19m they are 18f and pansexual?
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