9 month old has never stuck his tongue out

[ChocolateMoose]

I'd never really thought about it until I saw a friend's much younger baby do it the other day. Is it something I should get checked out or no need to worry?

As long as I remember my dd has never done it either when she was this young(she is now 23 months and does it a lot but it's different as it comes naturally when they learn to speak). Is this your only worry?
If yes then i would take it easy.Every baby is unique