Listening is more than hearing. But if you fine tune your listening skills, you can decipher the personality, occupation, social status, educational background, mood, experience, marital status, ***ual preference, etc.
example:
Omg(guys?)
If ever
Ask ko lang------gayish

Good to go
Eta
Etd
Insertion point
Extraction point-------military


Saan ka naka base (civilian)---social climber