OK. I don’t know if this is a well known friend thing.. Or maybe its a romantic. Can be done either way..
But if your friend ( or someone you care about) is sad right now, and too far away for real physical contact. Grab a pillow. Tell them to grab a pillow. If you want you can take a photo or video and send it to one another. And you tell them. That they are the pillow (and vis versa. )
Then. When they’re sad again and can’t hug someone.. They can hug that pillow and think of you. Later they can ask you “did you feel all my hugs last night ?”. And you can say yes..
It is just a really cute way to show you care.. And that you comfort one another..