I assume from the that there were details mentioned...the closest I ever saw to that was on VH-1 Legends, & it seemed that they were a little sketchy about it...even tho 2 of the principals, John Bonham & manager Peter Grant, were long since deceased...
The Zappa album I referred to was the Mothers' Live at the Fillmore, an X-rated suite of songs about the relationships between rock stars & groupies...lead vocal duties at that time were handled by Flo & Eddie, best remembered from their days with the Turtles, & they finished the set with "Happy Together"...

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