Penal Enlargement: Pennis Enlarger - Version - Penal Enlargement: Pennis Enlarger: Many men and even women have asked if Penus Enlargement Exercise Really Work? Yes it does!. Penis growth exercises are natural techniques used by tens of thousands of men worldwide to gradually but permanently increase the length and the girth of their penis. It's said to work by stimulating the growth of new cells in your penis, particularly in the corpora cavernosa.