In honor of it coming out that Mike and Will shared a can of soda in season 4, I give you a Miwi head canon.
When they were little they’d share food and drinks ALL the time. Like if Mike had a cup of juice or a soda everyone knew it was basically Wills too. Same with food. When Will opened his sandwhich at lunch the rest of the party knew that Mike was getting at least 3 bites out of it.
Because of this, when one of them got sick the other one ALWAYS went down with him. Will came down with the flu once and Joyce immediately called Karen to warn her. Sure enough the next day Mike was sick too.
What their parents don’t know is that the day before Mike took a drink out of Wills water bottle, Will had warned Mike that he felt really bad, but Mike just shrugged and told Will that if they were both ill at the same time they could still have sleepovers together (kid logic).
(Last time Will came down with a cold by himself Mike had been miserable and missed Will so bad so he thought this was the perfect solution).
