Im also uncut, and my pops always told me to pull my skin back when I pee’d and to wipe my head with tp if it got a little wet. From as young as I could remember. He also told me to wash it with a washcloth whenever I took a bath. I used to get that uncut white fungal type of goo under the skin, but I eventually trained myself to Always keep the skin retracted, and it went away. So over my whole life Ive been constantly retracting my foreskin anytime it went foward. And now it stays back for the most part, (except when Im freezing my ass off).
Also when I was a kid I used to want to get my foreskin cut because I “wasnt like the other boys”. My dad told me that when I got older I could make that decision if I really wanted to. I decided not to follow through with that. But Now that Im older Im glad I didnt make that decision because its just taking more away from my natural self! I feel completely normal now you know? Plus my skin doesn’t go foward. So just give him the hint to pull his foreskin back as much as possible.