Not sure how small this is, maybe simple, maybe not. I'd love to see either a rework of the whole sexual preferences system (probably not simple) or a toggle to lock the preferences of individual sims (potentially simple). I'm aware that there's at least one mod that addresses the latter, although I haven't had a chance to check it out yet (and I'm not yet sure if it will play nice with my other mods). But not everyone has the option to use mods, and not everyone who can use them wishes to do so.
A number of the sims I create are intended to be bisexual, but because of the way the game works, most eventually end up being either straight or gay. Maintaining their intended behavior takes waaay too much micromanagement even with the use of MCCC to manually reset their preferences when in-game interactions cause things to get too far out of balance. I do deliberately continue to do this massive micromanagement to maintain a certain few as bisexual because it has significant impact on their particular social structures and storylines. The ones I give up on, I have to just pretend those eventually chose a preferred partner, not necessarily a preferred gender. I wish I didn't have to play the "Either/Or" scenario all the time, that's all.
