Is it normail to only want to preform cunnilingus?

I am a 46 year old male that loves the taste of pussy and loves to perform cunnilingus. I prefer to give oral than to have intercourse! I love the scent taste and especially the liquid from orgasm. I would never was my go-tee If I could get away with it.
I have always loved to eat pussy ever since I was first instructed to by an older lover (I was 19 she was 41). I was a virgin and I couldn't stop from prematurely ejaculating so she said I would never please a woman like that. I spent the next year and a half in her "training" Every lover since has appreciated it.
I have still not been able to cure the PE but since I always go down first (and after) its not a problem.
When I met my wife she was absolutely stunning and we flirted and dated for a couple of week. Finally we had an extreme make out session in my car. While she was kissing me, she had inserted her finger in her vagina. She put it in my mouth and I exploded, I came right then and there in my pants. I was so embarrassed but once she got over the shock she was very happy with the reaction. I cannot resist her and the smell taste scent and feel of her vaginal. I am not able to make through penetration without ejaculating, but she told me not worry, she didn't get off on intercourse but on oral which made me so happy. I passed my oral exam with flying colors and we were married with 6 weeks. 10 years later I will do anything to eat her out, I think there is magic in her vagina! I would much rather give her pleasure (which also pleases myself, I have orgasmed in the act of eating her so its a win-win situation. After she is satisfied I masturbate to her beautiful nakedness.
Is this normal? Does she have me hypnotized? I know we are both happy so there must be something right about this..