Oral sex?

So I've been dating a new guy since June. We're great together, super comfortable with eachother, conversation is good, we have everyhing in common and the sex is GREAT! Probably the best I've ever had....but one day last week he asked if I've ever had my butthole licked during oral? He must have seen the look on my face and explained that he had been with a couple girls in the past who really liked it and asked him to do it. He said he wanted to know if it was something I was into so he could do what I like. Well I haven't...never even thought about it actually. So my question is, ladies...am I missing out on something?? Is it that good?