My baby brother who is just turned 5 is growing a mustash and a beared?

I was playing with him a fwe days ago and was looking at his face and saw slight sideburns, but like proper sideburns on his face, and hes got a slight moustash. Is thi sbad. Its erally weird because i havnt even grown sideburns yet and only have a sligh moustash, which im happy because i dont realy want one but isnt it a bit weird to grow a moustash that early