If you're talking about the frenlum, it doesn't just break off. Not normally anyways. It does stretch if given time and pressure, but it is definitely not something to worry about.
Your glands (head) become less sensitive to friction later on. A circumsized males penis builds a sort of callous, whereas a uncircumsized males doesn't really. But it does get less sensitive to friction after a while of touch. Don't worry about it AFK Protector, it'll all come in time. Your body was meant to do this. Animals don't stretch their foreskin or even retract. But animals don't use condoms either, which becomes a bit of a problem for uncircumsized guys who can't retract.
It's simple. Just do the stretching exercises like some of the guys said here. It'll get elastic in no time. You just start pulling back as far as you can from time to time and in the shower as well as when you're taking a piss and eventually, you'll be able to fully retract it. In the beginning, it might hurt to touch your glands or even let it get exposed to air, but the pain will go away later on and you won't feel it at all.