Question

Description acceptable. It’s not sleeping, but Hermaphroditus performs this action in an artistic motif called anasyrma, (15[1])also used in the Aphrodite Kallipygos. Figurines (15[1])depicting a face over the torso, so that the chin is at the level of the vulva, are identified with a figure who notably performed this action. On the day Cu Chulainn took up arms, Mugain led the women of Emain in performing this action so that Cu Chulainn could be subdued in vats of cold water. Jokes at the Eleusinian (15[1])Mysteries honored (*) Baubo, who made a grieving Demeter laugh by performing this action. Coping with an insult from the baboon god Babi, an angry (10[1])Ra returned to his duties after Hathor cheered him up with this action. The ritual dance kagura legendarily derives from a performance involving this action. For 10 points, dancing and what lewd action performed by Ame-no-Uzume lured Amaterasu out of a cave? ■END■

ANSWER: flashing [or mooning; or stripping; or exposing one’s genitals; or exposing one’s buttocks; or exposing one’s breasts; or lifting one’s skirts; or removing one’s clothes; accept anasyrma before mention; prompt on telling jokes before mention with “what other action is she famous for?;” prompt on making Demeter laugh with “how?”]
<AY, Mythology>
= Average correct buzz position