Well, I'm sure I am it would be unreasonable to expect that, but now that I have got your attention I just want to mention this, feel free to pass it on in order to prevent more accidents:
From the human perspective, a kiss on the cheek is a harmless expression of friendlyness, from a dog perspective it's a different thing:
If dogs were still running wild, the way they would kill their prey would be by grabing it by the neck and giving it a good shake. This is still embeded in dogs' nature, you have seen them playing with toys this way.
In the same way, when 2 dogs fight, the one that grabs the other's neck is the one who wins the fight, with a good likelyhood of the less lucky one dying in the process.
It is therefore that when a dog sees another mouth going straight in the direction of its neck, the ancient instict of survival just kicks in and they bite back.
It may be that you kiss your dogs' cheeks without problem, but then your dogs trust YOU enough not to react, but this might not be the case with visits, other people, or even other members of your family.
So please teach your children that it is not safe to kiss even friendly dogs on the cheeks and, do not let anyone try to kiss your dog on the cheeks either. If this was general knowledge, many accidents coukd be avoided, many people wouldn't have been hurt and many friendly dogs wouldn't have been put to sleep.
Thank you,