Being without underwear makes the penis grow

Being without underwear increases the test conducted by boys in Italy has shown that being in underwear for just one month can make the penis grow by 2cm. Why does this happen because the penis, being inside the underwear, tightens and makes it remain “free”  even a month helps a lot

Wondering if it works at all ages? The answer unfortunately and not only works for people under about 50. Surely puberty will have a lesser effect but always helps. In addition to increasing the penis this will make you ejaculate  you will also feel more free.