Yeahhhhh it's a little nuts to me how hung up on the fine details some people get. That's not the only reason though. It's also a UI thing. Adding more would mean reconfiguring the UI somewhat because making the font smaller would make it quite hard to read imo. With regard to the lesbian thing specifically, I prefer to have that sort of thing come up through the story. I don't really like to label characters as potentially lesbian or bisexual just for porn game reasons. Instead, there's gotta be a plan for why they swing that way from a story perspective. It's hard to explain without spoilers, but basically I don't really want to treat bisexuality as a fetish, instead I just want to feature any characters who happen to not be straight just as characters who happen to be that way, and portray that aspect of them when needed outside of just using it as a justification for lesbian content. Easier said than done since I'm not a writer, but it's what I want to do long term anyway. Whilst I do think it's fun to give little bits of story through the sexual stats, I don't want to form too complete of a picture with them, or at least not yet. Who knows for future? Certainly not me...
Of course, it's still a porn game so it's also planned that if you push for it you can get basically any of the girls to engage in lesbian type stuff, which does complicate my plan for the portrayal of bisexuality, but I'll tackle that at a later date.