Sirius had done this a million times before. Well, not a million, but he had gotten birds out of their blouses quite a few times before this. Remus wasn't a bird though. The inner voice that had reasoned with him over the fact that Remus was so delicate and that was why he found himself attracted to him was promptly shut up at the feel of his hard body pressing down into his. It didn't stop the positive reactions Remus was getting from him, though it did open a whole new can of worms for Sirius who was trying at once to handle how this felt and how much he liked it on top of the fact that he knew he wasn't gay. At all. He didn't even lean that way, he thought as he arched up into the other man. Right. Maybe just a little. Maybe Remus was an exception. Maybe sometimes close friends did this? Groaning into the others mouth, he pressed up to flip them over so Remus was beneath him. Trailing his hand down the others side, he stopped at his knee, cupping the back of it to grab it and bring it over his own hip so he could press closer.
Letting out a shuddering gasp, he broke the kiss and let his eyes fall shut as he rolled his hips forward once more. The friction was delightful, but he hated the fabric in between. He was too frightened to rid them of it though so instead he kept himself moving. Leaning forward, he caught Remus' lips in a heated kiss once more before his curiosity got the best of him, as it was prone to do. Letting the hand behind Remus' knee trail back up his thigh, he brought it over to the front of Remus's boxer briefs, pausing for but a moment to pull back before he palmed his erection through the material and waited to gauge his reaction.