All guys have their hot buttons and, damn, this is mine!! It's a tough quality to interview for when hiring which is why I probably shy away from hiring. So many factors to consider, some like it sloppy (if you're reading potential candidates, I don't), hygiene so important and, most of all, well-controlled "depth" with perfect lip connection once the tongue finds a comfortable resting place on the interior. OK, I've said enough, have to hit the "cold" shower!