She looked at him and smiled.
"Whatcha smiling for this time?", he asked idly.
"You make me smile", she said. "Just thinking of you makes me smile."
"Yeah, right!" in amused disbelief. He knew this game. "But you know what they say about people who smile too often", he continued, half grinning.
"That they're mad?" she asked.
A vigorous shake of his head.
Another negative shake.
"Maybe only mad people are happy anyway." She knew he'd find that as amusing as she did.
He smiled back.
"They're amused too easily?", the third guess always had to be a good one.
"So, tell me already."
"They say people who smile the most are often the saddest. That the smile hides their sorrow and lets them pretend they're happy for just a while."
She smiled wryly. Close enough to home to make her wince.
"But what about the people who're really truly sad and don't smile?" she objected.
"I suppose unabashed wallowing in sorrow comes with it's own special joy, no?".