When is it correct to make continuation bets?

Originally Posted by Fnord

Originally Posted by martindcx1e

So as a general rule one shouldn't make a bet when it will only be called by a better hand, correct?

I LOVE to bet with air. Almost as much as I like to bet with the nuts.

My rule is:
If I would hate to be raised because calling/folding would probably be close then I generally don't re-open the betting.

Wouldn't you always hate to be raised when betting with air? Help me understand please.