Heaven's Gate also tried to get male members (ha!) to undergo castration, though they didn't require it and the whole idea lacks any appeal, so only a small handful of the cult members actually DID do it. But that had less to do with controlling how they did and didn't have sex and more to do with the cult leader's (I can't remember his name) struggling with homosexual urges and coming to the conclusion that somehow it would make things better if he lopped his own balls off and tried to get the other men to do the same.
But cults like that are few, far between, and extreme.