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Originally Posted by Daniel_
Surely this is not true, because the body is being pressurised equally within and without?
The breathing gas is at 2 bar, the water is at 2 bar, so the pressure differential across the body is at 2 bar.
If this wasn't the cse, your eyes woud implode and your tongue would shrivel up, surely?
I know physics and I know biology, but I don't know diving (other than the muff type).
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I always assumed it had to do with the increased nitrogen saturation in your system. That and the general effects of increased physical activity, though I do try to dive with very little physical out put- don't want to be an air hog. But as always I could be wrong. All I know is after diving to any depth my cock is more of a rumor than anything else. I will say when diving on the southern end of the Mayan Rivera it does return to normal rather quickly. Not sure about the science of it but my gut feeling is it's an effect of the topless beaches.