Article here. Excerpt:
'Exposure to bright light - similar to daylight - boosts levels of the male hormone testosterone and can triple sexual satisfaction, the new research found.
Low sexual desire affects significant numbers of men after the age of 40.
According to some studies, up to a quarter of men report problems depending on age and other factors.
Because sexual interest varies with the seasons, scientists have suspected that it might be influenced by ambient light levels.
To test the theory a team of Italian researchers from the University of Siena recruited 38 men diagnosed with low libidos and treated half of them with daily doses of bright light.'
