The Sims 3 - Few Words About It

I was reading one of the blogs, and it mentioned that you can't choose which gender your Sim is attracted to, but it will be determined by something or someone in the environment. That is like Sims 2, so I glossed right over it.
But, and this is a big but, now Sims will be largely autonomous. So, if someone wants a straight community or someone else wants an all gay community, that is not going to be possible to choose?
Are we going to be forced to let the Sims choose what they want for gender, and not find out about it until it is too late to change? I can just imagine someone running themselves ragged trying to make sure that every Sim of a certain age in the entire hood is having experiences with the gender they want the Sim attracted to.
I see a real need for a mod, here. I think people should be able to make gender attraction choices for themselves, and not have a game force a choice on the person that the game designers thought was the proper choice for everyone.
You will note I carefully avoided making any value judgments about gender preference, and I think this thread should probably stay neutral on that aspect. But don't you think that in an autonomous hood, we should have some genuine choice?
Create unique Sims and control their lives. Customize their appearances and personalities. Build their dream house! Explore their ever-changing neighborhood and meet other Sims in the town center. Choose whether (or not!) to fulfill their life destiny and make their wishes come true. Get inspired by the endless creative possibilities and unexpected moments of surprise and mischief.
The freedom of The Sims 3 will inspire you with endless creative possibilities and amuse you with unexpected moments of surprise and mischief! Create millions of unique Sims and control their lives. Customize their appearances and personalities. Build their homes - design everything from exquisitely furnished dream homes to quaint cottages. Then, send your Sims out to explore their ever-changing neighborhood and to meet other Sims in the town center. With all-new quick challenges and rewarding game play, The Sims 3 gives you the freedom to choose whether (or not!) to fulfill your Sims' destinies and make their wishes come true.