Yeah, I'm letting the gender pref info Show Sim Info showed me influence MY flagging done via MC. They'll pretty much all get together with whoever/whatever, if I tell them to. 0/0 or 100/100, or if they do swing one way or the other (anything in between), the mod doesn't care during pregnancy alarms. It looks for flags, not preferences. I've not seen anything USE the prefs, actually. But since they're there, sometimes I do.
I'm widening out my gene pool (and keeping my married teens out of the procreate mix, affairs FTW there! :p haha!), in fact... (idea from a story I've read), I have males set up as the only inseminators (like RL), so my same-sex females I'll leave marked till they marry... then I unmark them to give them a chance to get pregnant during an alarm. "Taking one for the team," kinda... once they're pregnant, to perpetuate the gene pool, I'll re-mark them for same sex, and they can be true to their nature again.
Animated paper dolls. Pretty fun trying to see what all I can get to happen. ;)