DD (16)'s male friend - who seems lovely: kind, affectionate, unpretentious, hard-working, fun - is planning to go to Amsterdam in the autumn with his mates to celebrate their 18th birthdays.
He told me this when I asked if he was doing anything special for his birthday next week. "Window shopping" is his phrase. He also joked about bringing me a special cake back. I didn't make much comment at the time, but I was in two minds about expressing my disapproval.
Any thoughts on what an appropriate response would have been?