Sounds disgusting.

Tiny people appear to have massive heads, because of their small bodies.

If I were* smarter

When using be in an if clause for an unreal conditional sentence, always conjugate it as were, no matter what the subject is. Even if the subject is first-person singular (I) or third-person singular (he, she, or it), still use were with an if clause in unreal conditional sentences.

https://www.grammarly.com/blog/conditional-sentences-was-instead-of-were/