Should I draw a nude self-portrait for my boyfriend?

My boyfriend (M30) and I (F26) recently went through a conversation about him preferring to have visual stimulation while masturbating on his own (we don't live together or in the same city and mainly see each other on weekends). We've been together for a little more than two years and as the relationship deepened I've found myself more and more insecure about him watching porn for several reasons; when I talked to him about it he said that he would stop consuming it altogether now that he knows how I feel about it. I didn't want to force this onto him and wanted to make sure it was ok: he said it would be hard since he's so used to it but he wants to do this for me. He also mentioned that he would prefer to look at pictures of me if he had any, but we both agree it's best if I don't take nudes as technology and phones can't be trusted to remain private - he's actually more adamant than me in this sense. At current time he's avoiding watching porn and tries to only use his imagination when masturbating, but I can tell it's hard for him and I would like to help somehow. I recently thought of a possible solution and would like your opinion on that. Since I'm good at drawing I could gift him a physical nude self-portrait of me in a pose I know he likes. It would be a gesture to show appreciation for what he's doing for me and that I still want to help him, still keeping things intimate between the two of us. If he likes it I could even draw more, maybe asking him what he would prefer to see. I just don't know if it would be better as a surprise or if I should talk to him beforehand to know if he would e joy it. Do I just go for it or ask first? Would you men on this platform appreciate such a gift, if you were in a similar situation?