Ds (17) is out socialising a lot. I ask him to let me know (usually via whatsapp) if he will be home for dinner. This is, according to him, not worthy of an answer as it is a stupid question.
When asked if he would not answer the same question if his gf's mum or his Granny asked it , I was told that no-one else asks such a stupid question so the question would not arise.
Please reassure me that it is normal to ask the children to let you know if they will not be home for dinner or explain to me why it is a stupid question. I don't expect to be told far in advance but by the time I start cooking, I like to know how many I am cooking for.