Children get older, but good manners are timeless. Tiffany’s Table Manners for Teenagers (www.amazon.com, $17), written by Walter Hoving, a former Tiffany’s chairman, has been required reading for (aspiring) polite teens since its publication in 1961. Here, a sampling of its wisdom and wit.

“It is customary for the young man to help the young lady on his right to be seated. When you both have been seated, don’t look around like a startled beetle. Turn directly to the young lady on your right and start talking.”

“You don’t have to wait for your hostess to start eating, but don’t leap at your food like an Irish wolfhound.”

“Don’t let your elbows stick out like flying buttresses. Keep them close to your sides.”

“If you spill water on your partner’s dress, offer her your napkin and say you’re sorry. But don’t start mopping her. It might be misunderstood.”