Answer:
Three little letters. A paradox to some. The worse that it is, the better it becomes.
Take off my skin, I won't cry, but you will.
My first is twice in apple but not once in tart. My second is in liver but not in heart. My third is in giant and also in ghost. Whole Iβm best when I am roast.
Where do you go in through one hole and come out through two holes at the same time?
He has married many women but has never married.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?