I made some home-made chicken soup and it was heartily enjoyed by the family. My 9 yr old was down to just broth and picked his bowl up to drink. I gently told him this was not good table manners and to use his spoon. As children are wont to do, he innocently asked why he couldn't drink from the bowl as this made more sense.
Other than my being taught that it was rude and uncivilized, I didn't have an answer. I told him something about noisy slurping but one can do that eating with a spoon.
Should I enforce the "use a spoon" rule or is it okay to drink the broth by lifting the bowl if it's just at home? Are there any restaurants where lifting the bowl would be okay, like a pho place?