Awww ur doggie’s jealous. Anyway, I mean the obvious thing would be to keep your doggie away from him when you and the guy are gonna fuck. But on the human end of things, I wouldn’t worry about it; he’s not gonna be mad at you for that. All he’s thinking about is that YOU (the human he was actually trying to bang) didn’t reject him. He’ll be more than happy to do a take-two next chance he gets. I mean, your dog didn’t maim him or anything, right? Like, no serious injuries?