He is a Kurd, which belong to the worlds hairiest people and which are known for balding early. In general men from turkish, kurdish, persian and arab origin are known for being the hairiest and also for early balding and generally badly aging. They develop early (growing full beards by 13 and chest hair by 14 and looking like a fully developed man by 16 is not uncommon among them) and always look older for their age. That may look good when they are around 20 but as soon as they reach 30, they are rapidly aging in a bad way and significantly lose their attractiveness (as hot as they are at 20, as ugly they are at 40). It could very well be that he is only 21 now, I wouldn´t be surprised because of knowing these facts. And to be honest, for a Kurd he is even less than average hairy (most Kurds have much more chest hair than him), so that might be of some benefit for him when it comes to balding.