You probably have plenty of protein in your diet. Requirements aren't that high for it. They're not a complete protein either but easily become one when paired with stuff most of us eat anyway.

They're pretty decent for b vitamins and things like copper (which is used for iron absorption).

Long story short you probably just like PB. I mean it's nice stuff but easy to get sick of.

Could just be your body trying to maintain weight and getting a big craving for some thing calorie DENSE