13 year olds this days

Went to my one of friends birthday and I ask him who's the guy sitting on the corner out of curiosity he told me that it was his younger cousin he also specified that his 13 which shock me because I thought he was the same age as us cuz of the tattoo and piercing not to add me and one of my friend saw him smoking not even vape but a cigarette which doesn't make things any better..