"Well, maybe that might be a reason why they don't come back. Also, shagging random Muggles works even less when they don't even know about the wizarding world." Not that it was going to be a problem here.
Peter sighed. "Sirius, again, you make it very difficult for people to think that you care. Whether you meant to or not, you've cultivated this image of the bad boy, the one who doesn't want to be tied down. When that's the image, the people you attract are the ones who don't want repeats." He listened to Sirius describe Kirley and a sense of panic set in. This sounded the start of another love affair. "What kind of people have you been shagging that don't even care if it's good? Fuck, I've paid for sex and I've made sure that it was good."
He squeezed Sirius' shoulder gently. "Maybe things are different with Kirley, because he knows more about you than the other people. Even if it's not serious, it's still different." Peter leaned his head and pressed it against Sirius. "Except it did change, Sirius. Maybe not as much where you're from, but it had started to change. Remus had started his missions and not being around. I worked so I didn't have as much time. What you mean is that you and James and Lily were spending time together."