If I am doing individual portraits and you aren't liking the cheesy smile, DON'T tell them to "say cheese." Take a walk if you need to, but the worst thing you can do is threaten them to smile. I will talk to them, ask questions to get them to laugh and get that true joy. If you have ideas or songs that you know your child will love, I'd love to hear them. I always say that planning to get a special treat after the session is good
If anything, dads often have the hardest time with that natural smile.