Three-Term Contingency of the Day: Have Some Gum
Antecedent: I have coffee breath and I'm about to meet up with someone.
Behaviour: I stick in a piece of gum and chew on it.
Consequence: Coffee breath goes away (negative reinforcement).
Another everyday example of negative reinforcement. Gum chewing is reinforced because it removes the unpleasant smell and experience of having coffee breath (or onion breath, garlic breath, fish breath...etc.). If the gum works, you are likely to pop another in the next time your breath stinks. I saw you doing the breath test. Have some gum.