Most Helpful Guy
Basically means he likely is only kind to her because he's getting laid. Otherwise... he's a jerk, and that's his natural state and personality. Lovable is he? Sounds like a terrible double standard, and someone I'd be ashamed to be seen with, much less know and be intimate with. After all, by being with him you are basically rewarding him by tacitly saying it's OK and not dumping him immediately, and are condoning it by extension.
Most Helpful Girl
He's a guy he just wants some! Honestly the girl should get over him, it would be for her best interest! Especially if he doesn't change