From "A Touch of Lavender" by Megan Lindholm:
"mostly we'd talk and laugh. His laugh reminded me of a giant grasshopper chirring. Once he told me that Skoags had never laughed before they came to Earth, but the idea of a special sound made just to show happiness was so wonderful that now it was the first thing that all exiles were allowed to do.
Each Skoag got to make up his own kind of laugh. He said it like it was some big favor for them. Then he told me that my laugh was one of the best ones he'd ever heard. That first day, when he'd heard my laugh in the street, he'd known that anyone who could create so marvelous a sound had to be very special indeed.
And then he laughed my own laugh for me to hear, and that set me laughing; and we laughed together for about ten minutes, in harmony, like a new kind of song."