object of a preposition

Reg made me watch this documentary about The Who. It was all right, I mean, I don't actually like the Who, but learning stuff about 60s bands is always fun. And he's almost convinced me that I would like their later stuff. My argument is that Daltry's voice gets worse with age, even though the music gets better. Well, I'll try it sometime.

I then had "the documentary continues" dreams. THE REAL REASON THEY BROKE UP. I can't recall what it was, though.