why won't he go down on me?

Helen • 23. Staying gold.
 When my boyfriend and I started having sex and getting comfortable with each other, he tried giving me head. He explained to me that he had never given head to any of his previous girlfriends and that I was the first.  He then later explained to me he didn't like the "taste" and asked me if I minded if he got flavored oral sex gel. I told him that I was okay with that and I was even willing to use it on him. We never got it. He tried giving me head since we discussed the flavored oral sex gel but it lasted 5 seconds because of the "taste" again. I told him if he didn't feel comfortable it was okay and he said okay. It has been a few weeks since he tried but he always asks me to go down on him. I have good hygiene, I take care of myself so I'm not sure why he's not enjoying it. I have never experienced that with previous boyfriends. They loved going down on me. If anyone has suggestions on what I should do to help him enjoy going down on me as much as I enjoy going down on him, please feel free to comment.