Anything that puts strain on your ticker, like being overweight or smoking, also tends to take lead out of your pencil.
Testosterone is the second factor that's crucial to a strong erection, and there are plenty of weird things that screw with its production. All the items on this list can mess with your manhood:
1. Grocery receipts. The types of thermal paper and ink used for most supermarket receipts contain high levels of bisphenol-A (BPA), a chemical that increases your body’s production of the female hormone estrogen. And that estrogen boost—along with some other BPA-triggered hormonal changes—harms your hardness, finds a study from Kaiser Permanente.
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