What does the second half of the last stanza of John Keats 'Fancy' mean?

[Sameer Telkar]

Let, then, winged Fancy find
Thee a mistress to thy mind:
Dulcet-ey'd as Ceres' daughter,
Ere the God of Torment taught her
How to frown and how to chide;
With a waist and with a side
White as Hebe's, when her zone
Slipt its golden clasp, and down
Fell her kirtle to her feet,
While she held the goblet sweet
And Jove grew languid.--Break the mesh
Of the Fancy's silken leash;
Quickly break her prison-string
And such joys as these she'll bring.--
Let the winged Fancy roam,
Pleasure never is at home.

I understood until 'How to frown and how to chide' but can't seem to get the later part.Would appreciate if somebody explains it to me.

[Sameer Telkar]

Please somebody explain me from 'With a waist and with a side' to 'And Jove grew languid'

[cafolini]

The side is the hip. She hit Pellerano with the hip to stop a Gol in Tijuana. And with the waist she did some Argentinean so-called Turkish dancing.

[Sameer Telkar]

So its a mythology story.Thank you.