That was fun and I guessed pretty well!
We need a fake smile emoticon. ;-/ Nope, that's not it.
Gift giving is associated with a larger pulse of dopamine than receiving a gift
Shawn Achor TED Talk: The happy secret to better work
A.A. History -- Dr. Carl Jung's Letter To Bill Wilson, Jan 30, 1961
The Likely Cause of Addiction Has Been Discovered, and It Is Not What You Think | Johann Hari