Aha aw, a lot of people have told me something similar to this before, and the usual advice I give is to try and start small and work your way up. It’s not like you have to dive into NSFW drawings with hardcore themes, sometimes it’s easier to start off with doodling a character just having a fun time with themself.
That’s how I started, the first masturbation drawings I did of Tobias are what I first posted to this blog I believe. I didn’t really experience any hesitation with drawing them, I just wondered what my OC would look like wanking it.
If taking it slow doesn’t work, then maybe it will take a bit of time and practice before the flustered-ness calms down.
Drawing just the sexy parts without anything else attached might also help. Like, draw some dicks. Just kinda floatin’ in thin space. Good way to work your way up to drawing the entire sexiness.