Should Having Multiple Spouses Be an Option?

I agree that including polygamy/polyandry (much rarer) sets a bad precedent. I don't want elements in my Sims games that are closely associated with the exploitation of women and children, nor do I want anything beyond cartoony violence. If people want that stuff in their games they can mod it in.

As far as polyamory goes, I kind of view it similarly to people who want set gender preferences in TS4 (i.e. Sims being labelled LGBQ). The game would have to come up with definitions for each attraction preference and that would create a lot of bugs. For example, if a nonbinary Sim is attracted to masculine-presenting Sims, how does the game determine who is a masculine-presenting Sim? What happens if you're playing a "straight" Sim couple and then decide hey, I want to make one or both of them LGBQ? It requires very complex categorization that just restricts gameplay imo. To have a polyamorous system it would require a monogamous system existed and it just complicates things a lot. Now, having something like a "not jealous" trait that could be used so that Sims couldn't get jealous of rival romantic partners could totally work for people who wanted polyamorous-style gameplay.