I agree with Redcrx, Pingu. You shouldn't have to feel obligated to do anything that you're uncomfortable with - whether it's just to please your husband or to prove that you CAN. I think the matter's more common than people like to let on, as the majority of my friends refuse to give oral sex, for a variety of reasons. If I know so many like this, then there must be plenty more, so you're not alone. However, if you genuinely want to give it another go, ask your husband to guide you and tell you what feels good, but stop when you're ready to.