[SIZE="4"]Hearing a piece on NPR about first born and only children this morning got me thinking. Not something I do very often! Which led me to the query in the title of this thread. I'll tally the answers when the thread starts getting cold.
My thinking is that possibly as only children we had way too much time on our hands to fantasize, experiment, and dress up! And that's the cause of our wonderful malady![/SIZE]