"With You There To Help Me", by Jethro Tull.
Having a bit of a Tull obsession at the moment, which, well, is kind of difficult to explain, and not something most people would choose to talk about in public. This may be the difference between you and me.
Notable for its use, in a popular song lyric, of the construction "with whom": clearly, Ian Anderson went to a good school.
Two clips here, both pushing the song out beyond nine minutes, both from 1970. The provenance of one is uncredited but it looks like it's from the telly. (It's the better quality one). One allows you to hear the song; the other captures the insanity. And the hair. You choose.