Is it normal that i'm obsessed with his tongue?

Okay. So I finally got a boyfriend I can trust. he is amazing and I can't get enough of him. We have been dating for about 2 and a half years. He kept talking about sex so I told him I would give him everything he could imagine. We had sex, well, oral. And he pleased me the hole time. And for some reason, when his tongue was in me, I just felt like, it was amazing. Not just the feeling of being eaten out, I mean, the feeling of his tongue. And when he kissed me, I french kissed him. For some reason I couldn't get enough of the feeling of his tongue!!! Is that normal, is it considered a fetish?