most likely built-up ear wax...
It means very happy. Like dad was smiling from ear to ear as he held the new baby.
Well it could mean you just have water in your ear sometimes referred to as swimmers ear but, this usually happens when you are in the water a lot. For instance, spending a lot of time at the beach...
Having a peek in your ear means to look into the ear canal (usually done by a doctor).
You are reacting to the cleaning agent you are using, go see your professional body piercer.
it means that you're listening