should i wear uggs without socks?

I wouldn't recommend wearing warm fuzzy shoes without socks.

I don't know what uggs are. But if they are shoes and require socks then wear them. Your choice.

Only if you want smelly Uggs. Uggs are warm and can make your feet sweat. If the socks aren't there to absorb the sweat, it will go into the Uggs and they will stink. You can throw socks in a washing machine to freshen them up. Not so much with Uggs. 

You should always wear socks with uggs.

Eikes?

Yes