An actual email from my grandparents I got today:

Subject: a picture for you PROPER DRESS FOR FLIGHTS

ON YOUR RECENT TRIP BET YOU DIDN’T SEE FELLOW PASSENGERS DRESSED SO FORMALLY. THIS PHOTO SHOWS US LEAVING ON OUR HONEYMOON FLIGHT TO SICILY MAY 5, 1962. Note granny’s white gloves and my felt hat.  this was normal attire in those days.  Unthinkable to look otherwise.