Answer:
What always goes to bed with its shoes on?
What kind of coat can only be put on when wet?
I am the kind of ant that's good at math.
Who is the most foreign visitor you could imagine?
The person who makes me doesn't need me. The person who buys me doesn't use me. The person who uses me doesn't know it. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.