Oral sex doesn't turn me on ??

My husband loves to give me oral. And I'm very easy to get off...any other way but when it comes to him eating me out..I basically count the minutes until he actually enters me. Don't get me wrong, I love foreplay. It feels so good when he fingers me and makes out with me. But when he eats me out, it's almost like I don't have very much sensation down there. Does anyone else feel this way? Any techniques we could try to make it feel more arousing?