Brush Your Teeth for Better Sex
I'm not saying brush your teeth while you're doing the deed, nor am I suggesting you brush constantly, but the normal amount is a must. New research in the Journal of Sexual Medicine shows a link between swollen gums and a limp... Yeah.
The exact cause has not been determined. Although, poor dental hygiene can damage your circulatory system. That would hinder the flow of blood to your penis.
BTW - it's not just brushing. It's correctly brushing. You need to move the toothbrush in a circular manor around around gums. Not just back and forth.