Theory of Relativity

I don't know 'bout Einstein
or quantum gravity,
but I have my very own
theory of relativity.

My mom says I'm a genius.
My dad says I'm a snot.
My sister says I'm dangerous.
My brother says I'm not.

My Aunt Mable swears, though
I'm not sure how it can be,
that she's a monkey's uncle.
Eh, it's all relative to me!