So that students get to know and not be embarrassed to purchase tires, because teens are curious teens try we may never they didn't, so we ought to protect they as far as possible.
So that students know and do not be shy to go buy tires because of a teenager's life where we may not want to know they are not, so we should protect them as much as possible.
To make the students get to know and don't be shy of buying rubber because teenagers are old อยากรู้อยากลอง we could stop them not so we should protect them as soon as possible.