Men who garden at least 30-45 minutes per week halve their chances of experiencing impotence.
This according to several studies, and you can read more here.
I have an idea for new commercials that could tout ecological thinking AND help that guy from 1950 dressed in a santa suit. Can you picture poor Joe Blow (ahem), all depressed and alone, working in the garden--but then after a few weeks things start to take off in the compost-enriched soil. And no pesticides, please. I can imagine buxom brunettes tackling Joe and reaching for the water hose and... oh, I have to go outside now....