Gotta love Chief.
But I'm afraid I'm going to have to disagree with you here on one point, man. Using the end line I suggested (more of a small tweak, really), I think it's not really a neg, but rather an invitation for the girl to qualify herself. You shouldn't be coming across as judgmental here. She just feels like she needs to prove herself; that she's not clingy and needy, and prove your expectation wrong. I think that's what Sexy Bastard was going for anyways, and just needs to tweak his line a little to get the desired effect. If you test it a couple of times, and girls are still thinking that you're coming across as judging you, just try throwing a question into the end of it, making her respond and prove other wise. Just something like "You aren't like that, are you?" or "But you seem like you're different from most dog people, am I right?"