I wish people could just tell other people when they have food on their face without feeling awkward or uncomfortable about it. If you tell me YES it’s going to be embarrassing, YES my cheeks are going to turn a bright red, YES I will have to suppress the urge to vomit, but I’m not going to freak out about it.
You don’t even have to say anything. You can make the international sign for “You have shit on your face”. Fill your face with pity, point to your mouth, use your finger to show where shit is located and say “You gotta lil something right here”. If more people followed these rules maybe I wouldn’t have wandered around for 20 minutes after lunch looking like this: