Sooo in the shop in this morning some 12ish year old lad, still in primary school went up to me to buy some motor magazine, that had Zoo free with it

Right off the bat I was like No, and he pulled all the excues like oh i'm 14 and my ma's only out the door ! She gets it for me all the time and I was just like no sorry.
Was I right to is what I'm wondering

on one hand he was on his way to school and he'd have shown EVERYONE that dorty magazine and that'd get him in trouble with teachers, then his ma is called in and then it's traced back to me !
On the other hand he's probably gonna go home and google boobies and whatever he finds on the internet will be ten times worse than what's in Zoo magazine.
Your opinions ?