What really??
I was told to start this about 2 years of age....
My son is turning 4 in June and we have been doing this since he was two, Cleaning it always too though, but starting pulling the foreskin back and clean at about 2. He does it himself in the shower now, He knows the routine. (i always watch and try to help but he is more and more independent everyday)
May i ask who told you that age?
My parents and parents in law and the Drs told me to do this.