And make sure they don't ruin your meal.

By Real Simple
Updated May 15, 2015
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Messy little red-headed boy with pasta sauce all over his face
“It is the function of parents to see that their children habitually experience the true consequences of their conduct.”
| Credit: Annie Schlecter

Everyone is guilty of talking with their mouths full once in a while—sometimes you have something important to say, and it just can't wait! But if you have a friends or family members who can't seem to chew with their mouths closed or keep elbows off the table, you may want a little etiquette guidance before their habits become a serious problem. On this week's episode of "I Want to Like You," Real Simple editor and host Kristin van Ogtrop talks with Dr. Susan Krauss Whitbourne, professor of psychological and brain sciences at the University of Massachusetts Amherst, and Lisa Gache, etiquette expert and author of Beverly Hills Manners, about all different types of poor table manners, from people who take food from your plate without asking, to people who—gross!—blow their nose during dinner.

For more on the psychology behind messy eating (Whitbourne says the habits can stem from narcissism) and the best tips for correcting someone else's manners, listen to the full episode below. Don't forget to subscribe and review the show on iTunes!