Tallulah - sorry, I was so blown back by the conversation, I typed my query in a very confused way. (I have known people as they go through the transgender process - again, I don't think this is DD's situation, although I was listening for it.)

kelly0523 - that's exactly what I say. I have said it and that's exactly how we have conversations. She is taking it a step further and expressing her pangs to me. We have repeatedly discussed how and why both males and females have nipples, but why only women lactate. I'm quite open with anatomy, anthropology and sociology, but I also bring it down to "you are right where you are supposed to be," and "I remember feeling just like you do" (as much as I can).

ColinsMum - yes, DH and I do recall our own ideas of wanting to grow up and look manly/womanly like our older siblings, but they were more like middle school, not age 7.

KJP - Oh my gosh your DS6 sounds like my DD7. Those big thoughts. She has a different perspective but they could sit at the same table in the coffee shop. Can we have a play date?

HowlerKarma - BINGO. You said it exactly. It's asynchrony. "Help."