Don't tell Daddy, after we have been doing Christmas shopping, that we have bought him a "secret radio".
Daddy is not a horse. If you are in a rucksack on his back, beating him on his bald spot will not make him go faster.
If a bald man comes to the house, don't tell him that his barber, "Snipped and snipped and snipped until there was none left".
Not all stepmothers are wicked. Mine isn't and please don't tell her I taught you that she was.
And since they became teenagers.....
Don't buy more and more clothes and use them as a way of totally concealing your carpet.
Clothes from Hollister and SuperDry might be lovely, are certainly expensive but don't call them "designer" to justify your extravagance.