I think it can happen on a short distance run. I mean I would not want to run a marathon with an erection. Not my idea of fun. I think if I were erect and running, all of my blood and energy would go to my penis and I would lose focus, trip and fall. OUCH!! That would be a very painful concrete burn.
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I have to exercise in the morning before my brain figures out what I'm doing. ~Marsha Doble
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