thats a better question
its not.
you "can" inject synthol into anus, or eyeballs.
can and should is not the same.
now, as for the abs, if you come from other sports,where you did many many repetitive movements,involving the abs, they can and will grow an imbalance.
i dont think its ever fixable, no matter how i try to concentrate on one side, the strong side always always takes over.
here is visible

here,the 3rd row from top,left and right brick not the same.

its more obvious in person.