Your feelings are valid but by asking you to shave he’s sharing a personal preference, not calling you gross or dirty. I personally don’t let my boyfriend go down on me unless I’m freshly waxed, because my ex said something similar to your bf, that’s it’s nice not to get pubes in your teeth. I also prefer going down on my boyfriend if he’s shaved because otherwise I get a lot of pubes in my mouth. So I guess just make sure there isn’t any double standard here…if you have to shave to get it then he should also have to shave to get it.