It looks like Thor and Loki have the same leather supplier, look at Thor's cape and Loki's costume ! Can you imagine Loki going into a shop and be all diva like "I need a devilish costume with a lot of leather" and then saying "Thor, you could use leather you know, leather makes you look good, I know this shop there"
I’m screaming oh myg od
“You need a nice leather cape, brother.”
“I’m going into battle—”
“THAT DOESN’T MEAN YOU CAN’T LOOK FABULOUS.”