@icameheretowinry is much better with headcanons. but anyway.
Ed will rub her feet for Winry if she’s tired, but will talk smack the entire time about her huge feet.
Winry sees Ed shirtless. She’ll think ‘ooh, hot’ for five seconds and then snap back to reality. Ed sees Winry shirtless. He turns bright red and starts stammering.
It takes them a year into their marriage to be able to make sexual jokes/advances without being nervous.
Ed likes going to their kids parent teacher conferences since he loves being a called a ‘responsible dad’. This means Winry has to keep him from getting to jittery before the meeting.
Their parenting styles are very different, but they still respect the other’s tactics. Ed will let their kids fight for a little while but will step in if it starts getting to heated. Winry is more ‘I don’t care who started it, I’ll finish it’. Both will make them apologize after no matter what.