Everyone sits in a circle on chairs, and someone starts the game in the middle of the circle.
They pick someone (generally of the opposite gender), sit on their knee and say to them "Honey, if you love me, give me a smile!".
The person has to say (with a straight face and without smiling) "Honey, you know I love you but I just can't smile!"
If the person smiles, they become the person in the middle of the circle, if not, the person continues until they get someone to smile!