At a young age, the foreskin is still adhered to the glans. The foreskin also has an important protective function later on. At a certain age, which varies per individual, a boy should carefully discover his glans himself. For boys where this hurts, a warm bath can work wonders because the specific hypersensitivity suddenly disappears. Then it is finally possible to take a good look and see it all works from the inside. Also touching is suddenly no longer a problem.
A foreskin can also be a little tight at first, which can lead to swelling. This can also be solved with regular warm baths and a lot of retraction. For young lads, a bath is much better than a shower. It is much more willy-friendly.
The foreskin is a control mechanism to adjust the sensitivity of the willy. A hypersensitive willy can be made less sensitive by longer exposure of the glans. An extra layer of skin then forms, which even looks like the glans is peeling for a day. After that it feels much softer and more delicate. Conversely, the willy becomes more sensitive again by consistently leaving the skin over it. The extra skin layer on the glans disappears again automatically.
Finally, the foreskin is a directional mechanism when urinating. Urinating from a bare head is also possible, some men do that without problems and prefer it. However, due to the shape of the glans, the beam can also split and actually go in all directions. To make it a neat beam again, doing the foreskin over the glans is an ideal means.
There is a trick to pee with a bare head in a straight stream. By gently squeezing the glans with the index finger on the frenulum, it is often possible to make one single straight ray from several rays.