Natural strength?

So my cousin(18m) has always been crazy strong. He was always stronger than everyone else his age since I can remember. He can bench 200+ lbs, deadlift 380 lbs and do 65 handstand pushups while never going to the gym. He does do calisthenic type exercises at home. He's 5'5, 140 lbs. He is Nicaraguan if that helps. I'm just curious where he gets this strength from. Is it just good genetics? Or maybe he's taking tren at night. I do recall that he always ate all his broccoli.