It's funny, my SO has started wearing some of my older clothes (size large/medium) for women. They actually fit him really well and are pretty comfy since they're fleece lined and warm. I'm down to an XS/S, so they look like tarps on me but he just parades around in them for the fun of it. Just shit like sweat pants or yoga pants. It's fun sharing clothes, which sounds weird I guess. And we share Mens small shirts sometimes (they're a bit too big for me but perfect for working out in). So I guess couples that share stay together or something.