Also currently on iPlayer, this documentary on the brain mentions Dopamine's involvement with love. This may be old news to some, but as a relative newcomer to Parkinson's I'm intrigued by how many activities are influenced by Dopamine.
According to May, there are three stages to love. Dopamine appears to have influence in two of them:
Dopamine and Testosterone work together to cause racing hearts, slpless nights and butterflies in the stomachs of those newly in love.
Approximately 3 years after Stage One, 'romantic gestures' die off as Dopamine levels drop!
Is anyone else as interested?