Suddenly Gay Sims

I just want to be able to choose my sims preferences or something. In previous games, I liked letting my sims decide via wants/whims. Now, it doesn't seem to matter. I go with the first sim they show a preference for, but then they want to flirt with every other sim when they're feeling flirty instead of the one they have the highest romance bar with. I'm just asking for my sims to be consistent instead of flirting with every sim they know, especially when they don't have the romantic trait. I'm not saying I want every sim to be straight, but I want to be able to set some sort of preference or something; heck, I would settle for my sim's 'flirt with ___" to target the sim with the highest romantic relationship nearby.

I guess in the end, the game needs some sort of way to set preferences and/or an attraction system. I can play with the way it is right now, but my sims pretty much stay home or go out singly.