Mom with a Mustache?!

Sam seems to be very fixated on gender lately.  Here is a dialogue we had the other day.

"Mom, did you ever have a mustache?" inquired Sam on afternoon.

"A mustache?  No, I've never had a mustache," I replied while making a mental note that I better double check the mirror.  I did just have a baby, maybe hormones are messing with me.

"Yea a mustache.  Remember?  Didn't you have one when you use to be a boy?"

"Um, Sam, I've never been a boy."

"You've NEVER been a boy?

"No, I've always been a girl."

"You've always been a girl?  No.  Remember?  When you were little and you use to be a boy."

"Sam, I've never been a boy.  I have always been a girl.  Even when I was little, I was a girl."

"Oh.  Well, I'm a boy."

"Yes you are."

"So I am going to have a mustache!"

Should I get into how some women do have mustaches or how some women were boys when they were little?  Nah.  He'll get to all that in his own time.  Let's just keep it simple for a few more years.

"Okay Sam, you go right ahead and do that."