A dog in the living room uses his back legs to scratch the underside of his front legs at the same time.
A shirtless young boy rapidly makes fart noises in his armpit and leg while dancing.
A.A. make an instrument 2 boys use armpits and leg pits to play Twinkle Twinkle
Boy plays "Blue Danube" on his armpits
Kid has silly putty stuck under his arm
Underarm Sniffers. Girls sniff each other's armpits to see if they need more deodorant.