Headcanon #23841729:
One of Greg’s favorite shirts went missing a few months into his relationship with Mycroft. He pretends to look for it every once in a while but he knows that Mycroft has it and likes to wear it to bed, paired with expensive pajama bottoms, when he has to be out of town for an extended period of time. They both know but neither will admit it. Mycroft thinks of it as a weakness but Greg finds it sweet.
