Sucking Dick

Anyone not made their man cum from sucking dick? I've been with my husband for over 7 years and I've only made him cum once while sucking his dick. I like doing it and I try different techniques but I never get him to cum. Usually I only do it during forplay never just on its own. But even then he doesn't like when I do it for too long. He's never liked them or gotten an "amazing" one before, even with past girlfriends.

Is it normal for guys to just not like them?