I remember that vividly. Those folks in Congress didn't know what to make of Dee Snyder either, as they obviously expected hedonistic rock 'n' rollers to be dumbarses. Unfortunately for them, Zappa was the smartest guy in the room.
https://getyarn.io/yarn-clip/96de22ad-9555-480e-bfdd-1d232b3605be#Q2KZUaeT.copy