Froggy masturbation

From Voyeurweb's Wiki about Sex

Froggy masturbation is a type of handsfree masturbation where she sits like a "frog" on a dildo or vibrator moving her hips up and down or/and forth and back while the sex toy stimulates her pussy. If she enjoys nipple stimulation she can tease both of her nipples simultanously with her hands. The froggy masturbation simulates the cowgirl position. Froggy masturbation is often performed against a wall supporting her back.