1.Okay so we know how Remus likes his sweet stuff, sugar and all. I can't help but imagine Sirius being sort of the opposite or just with the smallest sweet tooth on this planet. I reaaaally happen to enjoy a scenario where Sirius seeing Remus eat a very decadent dessert with layers and layers of chocolate, caramel, icecream and other things on it makes his teeth rot just by looking at it.

2.Remus is a bit of a mama's boy and has absolutely no shame about it.

3.Sirius was gay and probably had a thing or two at Hogwarts with other people.

4.Remus can't study or concentrate on work in complete silence without background noise. I feel like his gramophone thingy in the PoA movie kinda does this justice. Also I just love the idea of Remus doing his summer homework with a Walkman though I don't think they existed then!