Dopamine -- It's what got you out of bed this morning and to work on time. Or if your dopamine levels are depleted, you pulled the covers over your head, while your spouse pleaded with you to go back to your therapist.
Dopamine -- It's what got you out of the house early to redeem that two-for-one mocha coupon at your favorite coffee shop on your way to work, and as long as you were there, might as well order that banana chocolate chip muffin. Bananas are good for you, right? Or if you just never got into the habit of that particular coffee shop, and it's not on the way to work, and you really like the French Roast you have at home anyway, then your dopamine never got you fired up, and the coupon went to waste.