Woh kon si cheez hai Jo ladki saal mein ek baar pehnti aur admi har roj?

Here's why:

* Ladki saal mein ek baar pehnti: A woman typically wears a wedding ring once, when she gets married.

* Admi har roj: A man wears a wedding ring every day after the marriage.

Let me know if you'd like to try another riddle!