Ive never received oral

su

i’ve been with my S/o approaching 4 years and before that I dated a few girls, but Ive never received oral. Me and S/o mostly do BDSM, but when we have actual sex it typically consists of him using his hand, penetrative sex, or me giving head (which actually really like doing). My S/o is on the asexuality spectrum and gets sex repulsion and early into our relationship he expressed that he wasn’t sure if he was comfortable giving oral. I never asked about it after that. I am curious as to if i like it BUT I really don’t like the idea of someones head being so close to my vulva. Does anyone have any advice?