A classic pairing of serotonin and dopamine
serotonin tattoo tumblr - Google Search More
Dopamine... I love it... #tattoo #dopamine
dopamine - the love and motivation molecule- haha just for lance
He was her serotonin, she was his dopamine.
dopamine tattoo wrist - Google Search More
Serotonin Molecule Tattoo, flower tattoo, happiness tattoo...
dopamine molecule ionic bond - Google Search
serotonin tattoo - Google Search