Boyfriend not eating me out? is something wrong with me?

Taisha
I'm with my boyfriend and we are happy, no fights or anything like that. But whenever it comes to stuff in the bed room he won't eat me out. I don't want to force him to do it either. 
He won't go down on me and I love going down on him. I'm not dirty. I clean myself everyday and well groomed. Whenever he fingers me, he loves the smell of my 'juices' but he won't taste it not even off his fingers. But he just won't do it. And it's not like he thinks it's gross, he has done it to he's past girlfriends and to the point that he loves it and asks them to sit on his face. Why won't he do it to me? Why am I different? What do they have, that I don't? 
Am I not special..?