They mean well. I'm pretty sure.
"Mommy, you look soooo pretty with makeup on!"
"The best meal my Mommy makes is McDonalds hamburgers."
"Your mommy only has ONE chin, but my mommy has THREE!"
"I love you more than Dora the Explorer."
"My mommy is the world champion of farts!"
"My mommy is good at drinking wine."
"Mommy, your haircut brings out your nose!"
"You're the best mommy I ever had."
"Mommy, you're cuddly like marshmallows."