Okay, this has to be due to morphic resonance or something:
'Brady Bunch' Star Reveals All About Lesbian Fling With TV Sister?
You know, now that I come to think of it, Marcia Brady may well have been the first round-faced blonde on whom I developed an obsession. She wasn't the last. Stop laughing, Bekitty.
Mind you, at the same time I also thought Abba was the epitome of cool...
(Probably not true, mind you, but why let facts stand in the way of a good story?)