Sirius was a teenage boy who liked sex. So basically just every teenage boy. And Remus was a mate and they had fun and it was a good outlet while options were limited. It had always been that way. It was his fault, Remus knew. This was how they’d started out and he’d never made any effort to let Sirius know it was a bit more than that for him. Mostly because a part of him thought that if Sirius knew then he would probably stop and Remus figured that this was better than nothing. Or it had been at first. Recently though...