Smiling?

Je
Anyone else's baby smile but not often.  My little guy smiles with his eyes but very randomly will just smile.  He is 11 weeks and was born 4 weeks early so would be 7 weeks if he had been born on or around his due date, I'm not sure if this matters or not.  Guess I'm just being a worrying mama ☹️ Here's a pic of him just for the cuteness factor