Conflicted to fulfill his fantasy

My husband and I have been married almost 15 years and he just revealed to me how badly he wants me to sit on his face.. I was shocked really. He’s only ever gone down once before and that was about 15 years ago. All my doing as to why he hasn’t since then. I’m a bit nervous about it. Would only try after having a shower but I also don’t shave down there. I get horrible horrible razor burn.. no matter what I’ve tried. Super self conscious here.. I’m also not a small gal.