The sixteenth time I shared a bed with Sirius Black was purely for academic reasons. We only had one Potions textbooks between us on account of my setting mine on fire when I got annoyed with my potions homework during the second lesson of the year and my parents not buying me a new one because it would just go the same way as the previous 6.
The night before the potions OWL I was panicked. I needed an E in potions to carry on to NEWT, and I needed the NEWT to become an auror. I was still pacing the common room at midnight, getting Moony to test me on the various uses of magical herbs and fungi.
Sirius finally got up and grabbed my wrists to stop me pacing, picking up our book in one hand and using the other to drag me up the stairs.
'It's gonna be alright, yeah? No need to panic about it,' he said. His voice was so calm that a little permeated into me. I smiled at him. He grabbed his wand and cast a lumos.
'Come on then, if you're gonna study all night for the OWL at least let's do it comfortably.' I grinned and grabbed the pillows from my bed, propping them on his so we could sit up comfortably with the pillows behind our backs. He drew the curtains and we spent the rest of the night learning potions theory by wand light, falling asleep, exhausted, at almost three in the morning.