No one riles Isaac up like Jackson does. It's funny, no one really understands why they're dating but they are. They fight constantly and it's hard to tell, as an outsider, if they're at all joking.
Headcanons under the cut.
A lot of the time it's hard to tell if they're joking when they fight in public, it can be weird for the people around them but Isaac and Jackson are having the time of their life
Jackson likes to drive Isaac places, school, the preserve, the grocery store, you name it and Jackson's driven there with Isaac in his passengers seat
Neither of them really has a sweet tooth and both are black coffee drinkers
Isaac cooks a bit more than Jackson does but both are the kind of guys who just live on ramen and take out
Jackson was the dinosaur obsessed kid in elementary school so now he has tons of dinosaur facts memorised
Both of them love Europe and living there, Isaac doesn't speak other languages but Jackson speaks pretty okay French from learning in school
They are very competitive with each other and especially when it comes to lacrosse or pretty much any sport
Isaac loves to read graphic novels and Jackson reads mostly biographies and memoirs
Isaac is the little spoon and likes to feel surrounded by Jackson's scent at all times
Oh my god. Isaac sends scarves to Jackson, too. It's like a sisterhood of the travelling pants, except they have a lovey dovey scarf relationship. Isaac wears the first scarf until it smells only of him, no longer of Jackson at all, and then he sends it back as a joke, with a note like "it needed a little something extra" and somehow it spirals into wearing scarves for each other all the time, jerking off wearing them, and skype sex wearing scarves... Frick, I didn't ship this before right now..