My wife is sometimes uncomfortable receiving oral sex. I encourage her to simply relax and enjoy. Sometimes she is able to do so and sometimes she is not. I think it has a lot to do with how her day at work went, or other extraneous events that are on her mind.

I have reassured her that I love performing oral sex on her with some success. She is more open to it now that I have eased her anxiety.

I would likewise encourage you to simply relax and enjoy. Obviously your husband would like to do this for you so it is only right that you relax and enjoy this expression of your husbands love and affection for you.

Lighten up and enjoy.