What do teens/YA need to know before they inflict themselves on the world?

[Trivester]

After reading a lot of threads about the behaviour of the boyfriends and girlfriends of older dc, it’s got me thinking about the lessons that might need to be explicitly imparted before they set out into the world.

Like not rifling through the cupboards/fridge/freezer in another house and scoffing food.

Helping to clear the table and wash the dishes should be automatic when you’ve just been fed.

Never, ever leave a mess behind you (make the bed, bring your glasses back to the kitchen, pick up your bloody crisp packets)

What else have I not considered?

I think just basic manners

• shoes off when you go into someone's house or ask if they want you to
• don't rifle through fridges/drawers/cupboards
• don't overstay your welcome
• help out with clearing the table
• match the tone and behaviours of the other household, if they're more restrained when it comes to affection don't feel up their son/daughter in front of them

Surely for most of that, you teach them to behave well at home, and tell them to behave the same elsewhere. The exception might be different rules on helping yourself to food.
My 18 and 23yo stepsons would find me very patronising if I reminded them how to behave elsewhere, because their dad has brought them up properly - as did their mum until she died. Parent right and you don’t have to tell your kids not to be selfish arseholes in someone else’s house!