Yawns are not the only infectious things out there besides germs. Giggles can spread from person to person. So can blushing. But maybe the most powerful infectious thing is the act of speaking the truth.
Teach me to sing and recite, To whistle and jingle and strum. Teach me to color and paint, To sculpt and weave and create. Teach me to sway and dance, To tap and leap and twirl. Teach me to laugh and giggle, To tickle and play and pretend. Teach me that life is beautiful.