To be fair, Sam wasn't so inexperienced that he didn't know how to kiss or make out properly. It was just those few major things he hadn't experienced. He'd kissed a lot of girls... Or. Not a lot of girls but enough that he knew what he was doing. Honestly though a lot of it was instinctual. Now and then he'd follow her lead while he learned what she liked. It was very simple really.
But he did sort of like being in charge. Not all the time, mind you, (it was nice to follow her lead now and then) just at the moment. He let his hand slip back into her hair where it was comfortable.