Do you smell down there? I mean went down on my ex once and bitch had a yeast infection that she either didn't know or didn't tell. Made me lactose intolerant.

Maybe you smell really bad down there and he just doesn't want to hurt your feelings. If not, maybe you aren't groomed. Last chick i hooked up with had a forest growing down there. No doubt it gave an excellent cushion when i was pounding her but pubes in mouth is not something i fancy a lot.

If it's neither, maybe he was just lying in the beginning and was actually a virgin and just don't know how to eat your coochie.

If that's not the reason either then you ought to sit down with him and have a long talk.

I wouldn't call this abuse but yeah there is a serious lack of respect and care for you from his side. I don't think he has registered that even you might have sexual needs. There is an imbalance in the relationship that should be addressed sooner than later.

As for his sulphuric acid, the taste depends awfully lot on what you eat. Ask him to change his diet. Include more fruits and vegetables rather than meat. More water. And you can Google this advice too. There's was something else as well that you should eat to change the flavour/taste idk.