i can imagine mj using peter as an armrest like. All the time. she sidles up beside him in the hall and throws her elbow up on his shoulder and he sends her this quick, blink-and-you-miss-it look of mixed exasperation and fondness.
he’ll be in the middle of a heated argument with ned in the library about whether the enterprise or the falcon is the superior spaceship and she’ll lean over to rest her arm on the top of his head, laughing as he ducks out from under it but he can barely hide his wide smile
peter pretending to be annoyed by it when people point it out but really he loves that she feels comfortable enough to touch him so casually (he doesn’t even mind the jokes about his height, though he will snap at anyone who pokes fun at mj’s stature)