Yesterday we took ds's 10 y.o. friend with us swimming (spa pool so not cheap), we had dinner in the restaurant and he stayed the night. After breakfast this morning ds walked home with him. If I hadn't stopped him at the door he wouldn't even have said goodbye and I didn't once hear a thank you from him. Is this normal for 10 y.o. or bad manners? I make a point of talking to my kids about pleases and thankyous. Would be mortified if I found out they don't say thank you when they spend time with another family.