From Barry Mills’ Zappa: A Biography:
Tom Wilson was Zappa’s main connection to the major record labels and whenever he was in town they spent a lot of time together, plotting and hatching schemes. Zappa didn’t see himself as just a recording artist, he had all kinds of plans and Wilson was interested to hear them. In June 1966 he signed Burt Ward to MGM, the actor who played Robin the ‘Boy Wonder’ in ABC’s successful Batman TV series. Zappa wrote ‘Boy Wonder I Love You’ and later that month, with Zappa conducting and Wilson producing, they spent two days at TT&G laying down half a dozen tracks; but the single, with Zappa’s song on the A-side, went nowhere.
The aforementioned A-Side: