I reported in a post a couple of years ago that I bought a penis pump to use in scientific sound experiments, where one sucks the air out of a jar using an air pump and the sound of the electronic bell inside the jar disappears, since sound energy can't travel in a vacuum. I hasten to add that this was a private experiment, not in front of a class of students, who might ask why my jar was shaped like an enormous dick........ But having done that experiment, of course I could not resist shoving the vacuum jar onto my John Thomas, (having removed the electronic bell first), and pumping the air out.... I reported that the results were somewhat 'amazing', with my member hugely increasing in size in a couple of seconds, as the blood was rapidly sucked into it. So I can understand that a penis pump would indeed be a boon for those with ED, and they can also do sound energy science experiments as well whilst they try to massage their penis back down to normal size :)
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