On quite a number of occasions recently I've seen adult (parent) driver with seatbelt on, next to teenager without. Rather perplexed as to how this works.
P: Put your seatbelt on, darling.
T: No thanks.
P: No seriously, could you please put it on.
T: I was thinking it might be rather inconvenient if Mum found out about Susie from HR....
Now step on it, I'm running a bit late for pony club.