There is nothing to "explain." It's just a simple fact of biology that penises do not "shrink" from anything, including non-use. That's not how human tissue works. You can't "extend" a penis or "shrink" a penis any way other than surgically. You're the one making the assertion that you can. Therefore, it s incumbent upon you to provide proof.Why dont you explain then? its easy to poo poo someone's post but where is your evidence to prove the contrary?