They lay panting against each other in a tangle of sweaty legs and heaving chests for a long time afterwards. Remus ran his lips over Sirius’s chest and shoulders lazily, kissing and licking across his skin wherever he could reach. Sirius realized that they did that a lot after sex, just lying next to each other for as long as possible, as though they were trying to melt into the other’s limbs. On nights like this, when their muscles were tired and their skin was slick with cooling sweat, Sirius imaged actually crawling into Remus’s body and burrowing deep, until he was part of his flesh and bones and thrumming blood. Sometimes he felt like he lived there already, sharing a heartbeat.