Boyfriends insecure

So the other night I was talking to my bf & I decided to ask him a question... I wanted to know if he masturbates without me sometimes. Which is completely okay with me because I understand sometimes you just gotta do you 🙇🏽‍♀️

Well he said he does occasionally & then decided to ask me if I masturbate... which I said yes. When I said yes I literally watched him silently explode in his mind. He was just staring & turned red as if I had just told him the world was ending??

Then he started asking me, do I not satisfy you? Do you do it all the time? How often did you have sex with your ex? Your sex drive is so much higher than mine, do I not do well enough?

& just all sorts of crazy!!!! We talked for about 20 minutes before he decided to shut me out. I could feel he was very anxious & overthinking. I did the best I could to calm him down but I didn’t think he would be so insecure!!

How can I make him feel more secure? He doesn’t take verbal compliments very well. He turns red & awkward. Is there physical ways or other actions I could do to make him feel more secure?