She says it’s all got to do with chemicals in the brain.
“There are more than 10,000 chemical reactions going on in the brain every second,” she says.
“The chemicals that make you feel happy – oxytocin, dopamine, endorphin and serotonin – are produced by the endocrine system.
“Not all of these chemicals are released at the same time and each has a different outcome.
“However, more of these chemicals are produced when we look forward to doing something we enjoy, we get up early, we go outside in the sunshine and fresh air, we challenge ourselves, we meditate, we concentrate on an activity that requires skill and generally do things that motivate us.
“That pretty much sounds like motorcycling to me,” she says.
“So when you get up early anticipating a good ride, already dopamine is starting to send happy signals to the brain.”
Different combinations of the chemicals come into play as you ride, she says.
“Add a bit of adrenalin and it’s like a happy cocktail for the brain.”
Sharon says an increase in serotonin can also reduce depression.
“You can increase your serotonin levels with fresh air, mild exercise and even morning sunlight, all of which you get on a ride.
“It won’t cure depression, but will help people cope.”
American dating service, BikerKiss, says Harleys, in particular, can even give women an orgasm!
The Southern California online dating service asked about 3000 members (1900 men and 1100 women) “is Harley your favourite motorcycle brand” and 31% of women said yes, compared with 19% men.
The most common answer to the question was that Harley motorcycles are “gorgeous and expensive”. One dating club member said: ”I love it when I am on a Harley. It gives you all the attention you want.” Another said: “it’s not about being pretentious or anything, or like I’m doing it out of vanity. I just love it deep down.”