esenbee - i think with the bathroom discussion, it would be most useful to explain that people use the bathroom that feels best (safest, most comfortable, etc) to them. later on down the road, your trans spouse may feel like using the men's room, or your DD might see people she reads as the "wrong" gender in the ladies' room. knowing that they are using the bathroom that feels best to them would help her make sense of that.
escher, how's that pregnancy going? i forget if you have an US scheduled, and how soon?
sphinxy, that sounds like one crazy summer. 2013 is shaping up to be really intense, eh? your DW's research opportunities sound so exciting!
two coworkers have told me this morning "wow, you have really popped!" and asked to feel my belly. this whole process is hilarious.