Kitten Sleeps with Tongue Out

I know this might be a silly question, but does anyone know of any health concerns related to sleeping with your tongue out?  My kitten is 5 months old and I've had him for a month.  The first time I saw him sleeping with his tongue out I thought it was just the cutest thing ever.  But, I've noticed he does it quite frequently (maybe once every other day) and now I'm a little concerned.  I've never had a cat that did this before!  He doesn't snore when his tongue is inside and I haven't noticed any signs of congestion.    

Thanks! 

gizmo does it all the time. he is a five year old cat does not affect him in anyway. I don't think you have anything to worry about.