These questions came to me while responding to "Women in Glorantha".
How do minotaurs procreate?
All the minotaurs we find as sample characters or NPCs are male. They appear to be human-compatible (see Morak, Noralayeep's little brother), but their normal bovine-headed shape may result from them humping cows.
From the herder's perspective, a cow giving birth to a minotaur is the loss of a bull calf but the blessing of the bull god for this cow's future offspring, so not really a bad thing. The cow's milk will be available to the herder, too.
Intercourse with beastmen is at best mildly scandalous - like the story of Yoristina's attraction to a centaur.