Disclaimer: I don't own HP.
James hated waking up like this. His head was pounding, his limbs throbbed with the not-entirely-unpleasant ache of a 'good night out' and he had no recollection of the night before. He groaned, realising that though he was in a bed and that was always better than a gutter, he was completely starkers, he was feeling a little too sated for his own liking, and he wasn't exactly alone. He opened his eyes and screamed, then leapt out of the bed and ran.
Sirius blinked sleepily. "What's wrong with him?" he asked.
"I dunno," said Remus, cuddling into his lover. "He was fine with it last night."