[Sonic's ear flicks reflexively and he baps at Shadow's face with his free hand, not at all bothered by Shadow's smartass remark. In fact, he's just grinning more.]

Right, it's not about picking favorites! To be perfectly honest, I'm thrilled that Shadow's gettin' out and making friends! And sometimes making out with those friends, right bud? Huh?

[He turns that stupid grin to Shadow before going back to focusing on what he was doing. Once it seems like she's good and wet he experimentally prods at her entrance, waiting to get her reaction before going further.]