“We go past Fat St Mary’s and up some Roman geezer’s back passage and then past a college named after some bird’s tit and then the entrance to Michaelhouse is hidden on the corner.”

HEH. So Sirius, this part!! This is absolutely lovely! I like how it's Remus seducing Sirius, and not the other way round :D And you managed to include Mickey Mouse too! SO MUCH LOVE.