Boyfriend dosent want to go down on me anymore. .....

Any other ladies have this issue? My boyfriend of over a year used to always go down on me. But now he dosent anymore... he says it just tastes funny and he dosent like it. But I always go down on him all the time.. even if he has his bad days with smellyness down there.. I've asked him if he could sometime again...but he always says I don't know or I don't really want to...I like it and it's kinda upsetting that he has stopped doing that ... Any advice maybe?