Okay, so I think it's only fair I bring up some ideas for this.
For starters, it's not right that I start straight, and without editing the save file, I can't become a lesbian or even bisexual. Even if I expose myself to books that would please the same gender, I would not be able to become bisexual. So, there should be an option to start as lesbian or bisexual. Not to mention that even if I tried to convince the other person to like certain aspects of the other same gender, i.e. big boobs, homosexual sex, etc. It's not enough to convert a straight woman into that of a lesbian. I can understand why. So, here's my suggestion, in the library, you should be able to find books that should change your sexuality. Porno mags to be exact. Now, it's annoying that you have to wait weeks just to read one book but there should be an option to read the current book you are reading to triple the amount of content to read said book. That way, you can either do two things at once or finish reading the book sooner to pass it along to your peers to read. And said books should be more diverse. Including books that involve changing one sexuality, there should be books that allow you to make gains faster. Like, if you read a book about working out and finish said book, you should be able to make gains at a faster rate. Like a multiplier. So let's say that you read two books on working out and you go to the gym, you should be able to make gains at a faster rate. The same can be said about any book, really. The more you perform such acts, the faster your gains should be.
Also, three ways are an excellent way to expose someone to same-sex acts and allow one to explore their sexuality. I just don't know how to perform a three way. I wish I knew tho. But that's my thoughts on this.
Also, asexuals should be a thing as well.
And if we gonna go on the deep end here, we could include transgenders as well.