Have you ever seen a small child cover his/her mouth everytime while yawning?

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How adorable would that be? I have seen an older child around 9 or 10... do that on a couple of occasions but not a younger child. Has anyone ever seen a cute little girl or boy who was covering his/her mouth with the hand each time they had to yawn? Was at a wedding, church, bus or some other place? Do you even know a little child who does this display of good manners?