Your Lungs
As your old fellow regains some life, you breathe easy. Your lungs’ alveolar capillaries – the channels that transfer oxygen into your bloodstream – dilate, supplying your heart and muscles with the fuel to support your soon-to-be-gyrating loins. As well as improving your performance in the bedroom, the American Physiological Society has found that this effect can enhance cardiovascular performance by up to 45 per cent.
Your Heart
Viagra blocks an enzyme that constricts the tubes around your heart, expanding the channels that lead to your ticker. This can lower your blood pressure by 50 per cent. Researchers at the American College of Cardiology have found Viagra to be as effective at fending off a coronary as many heart drugs. If a permanent erection seems a high price for low blood pressure, stick to less than 2.4g of salt a day.
Your Brain
By expanding the vessels in your brain, Viagra helps improve your memory and attention span. As it gives your pole a vault, the neural pathways in your head expand. Researchers at the Henry Ford Hospital in Detroit, Michigan found this increased blood flow to result in the regeneration of damaged brain cells, leading them to speculate that it could be a potential cure for stroke patients.
Your Eyes
While giving your trouser snake a leg-up, Viagra lowers blood pressure to your eyes. The choroid layers – which supply blood to your eyeballs – are left bereft, as your heart and genitalia work the claret required to raise your fancy. This shortfall can leave you colour-blind. Avoid driving for 12 hours, as researchers at Stanford University have found that you’re 16 per cent more likely to make a beeline for the nearest ditch.
Your Penis
Sildenafil, the substance in Viagra that activates your love length, works by relaxing the arteries that supply your penis with blood. This high-pressure flow rushes into the twin barrels of your penis – the corpora cavernosa – holding it aloft. The Journal of Sexual Medicine reports that one of the leading causes of erectile dysfunction is poorly designed bicycle seats, which can choke blood flow to your member by 85 per cent.
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