"Now, you have me intrigued. Which world would that be? And what's so fascinating about my point of you?" He was genuinely curious, because Remus seemed to see things in a much different way, and often they weren't even looking at the same thing.
"How can you take advantage of me if I'm offering to buy it for you?" he asked, because it made no sense to him. "It's just a broom, and it's not like I need this job to survive. This is just something I'm doing because Severus asked me. I wouldn't rely on the pocket money they give us to live. Can I get it for you as a birthday gift, then? You can't say no for that, right? And I would surprise you, but I don't want you buying something cheap in the meantime. Please, let me."
Regulus sighed. "It's nothing. It's just me, being me. I don't like sharing you, especially with that family - Potters, Weasleys, they are all the same." He brushed Remus' cheek. "I want to be there with you, and there's no special reason, just that I want to, because you haven't done it in so long, and flying is amazing, and it's not something we can do when there are people around. As you can see, there's no real reason other than I want to."