Roasting barley is an ancient craft still practiced today which involves drying the barley in the sun, sifting out inedible pieces, and finally, roasting the barely grains over a fire before they are brought to the millstones. This work is commonly done by older women in groups, who chant and have fun throughout the process. This lively atmosphere is also used as a metaphor for the actual process of roasting.  In the riddle, the tool used for stirring the barley in the fire is compared to an old woman doing a dance.  The pops of the barley corns as they split in the high temperatures are compared to the laughter of those enjoying the lady's dance.