It's always nice to put a decade of reference on these things. Some things chance slowly, some change fast.
I grew up in Primary in the 1970s, Mutual/seminary in the 1980s. I learned about Kolob, Heavenly Mother, getting your own planet. Was never explicitly taught about the Mark of Cain. Polygamy in heaven was talked about loosely among old timers, but no longer in Sunday School...
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