From what I know, and I could well be wrong, the initial Bolsheviks were “anything goes” with sex, break all the rules, up to and including promiscuity and homosexuality. But after some time they saw it wasn’t working that well, so they changed their tune a bit.
Maybe someone who knows more will chime in.
All Marxists use, and see, many things in traditional society not for any inherent good or bad in them, but for their inherent utility, or lack of utility, as conditions that can be exploited as tools to divide society within itself, against that which has built the society, to enjoin those divisions in an artificial unity behind the “socialist” man.
It is that process of division and artificial socialist unity by which all “disadvantaged” groups are exploited into making themselves the first soldiers of the socialists. In the end, they are always as expendable as is everyone else.