You know what? I don’t actually know… if I had to guess it’s probably just something really normal like the fact they move in the same circles, like I know Stamos is really involved with broadway and stuff. Any one else able to shed more light on this (with sources)?
I got the answer.South Park did an ep.about John Stamos’ brother coming to town.Sometime after that ep.Matt and John met @ a party and joked about it.Matt talks about here in this Youtube video of John’s bio @ 12:37 https://www.youtube.com/watch?v=YzK2PGvX46Q
Rad. Thanks =)