I've been following the list messages on sex and PD and on the impact of our environment and PD. I found the following quote in a book "Getting the love you want; A Guide for Couples" by Harville Hendrix: he is talking about Romantic Love. "What causes the rush of good feeling we call romantic love? Psycho pharmacologists have learned that lovers are literally high on drugs - natural hormones and chemicals that flood their bodies with a sense of well being. During the attraction phase of a relationship the brain releases dopamine and norepinephrine, two of the body's many neurotransmitters. These neurotransmitters help to contribute to a rosy outlook on life, a rapid pulse, increased energy, and a sense of heightened perception. During this phase when lovers want to be together every moment of the day, the brain increases its production of endorphins and enkephalins, natural narcotics, enhancing a person's sense of security and comfort." My eyes homed in on the reference to dopamine, not surprisingly! Does anybody feel that they might have had such a good time "in romantic love" that they used up too much dopamine. If there is a connection, and we did, we are paying for it now! A bit tongue in cheek but if anyone wants to read the book look for ISBN 0-671-71529-1 published by Simon and Schuster Ltd in 1993. Best wishes Bob Hills Leeds, England [log in to unmask] PS I'm no neurologist, psychologist or psychopharmachologist : just a Civil Engineer on the highways of life!