Heyah,
Okay I have a boyfriend and sometimes he gets food round his mouth and stuff but I'm to embarrassed to tell him.
Bit of a stupid question lol but oh well

Just tell him he has something on his mouth, he won't mind, I'm sure he doesn't want to walk around like that!

He'll be glad you told him. Just say, hey some of the food wanted to stay with you. I'd be ticked if my boyfriend let me walk around with chocolate or something on my face! :)

Just tell him that he has something on his face if u don't he might notice it latter and get mad at u for not telling him

Thanks for oyur comments:) I like peggyhills answer
Thanksxx