That's where a number of curious mods by BIlly Rand come in. But just because the game is designed a certain way doesn't mean players don't want to toy with certain simulations anyway, regardless of how socially acceptable they'd be in real life. Is it simcest?Īnother rule: teens can't become pregnant. If a sim is related to another sim, they can't romance each other-and they definitely can't marry each other, for example. Under normal circumstances, you can only pursue certain types of relationships with certain people. Mods allow players to add nearly anything they want to The Sims 4 -and this includes stuff that could be considered to be on the more on the taboo side of things.