A family of three

Question: I give you a family of three:

One is sits down, and will never get up.
The second eats as much as is given to him, yet is always hungry.
The third goes away and will never return.

What are they?

Question: What do you call a sad bird?

Question: What has a bed that you can't sleep in?

Question: How are doughnuts and golf alike?

Question: What cannot be seen or felt, but can only be broken by voice?

Question: What tastes better than it smells?