For #2, you forgot "I was born before it was possible to do ultrasounds to tell the baby's sex."

I don't know when that became possible in the US, but my sister is about to turn 23 and it wasn't possible for my parents to know if she was going to be a boy or girl. I have a cousin who's 17 or 18 and I know his parents did know and I thought it was the coolest thing ever.