Quote from Denise in the episode Spoiler: Zack's in This One
Denise: To be honest, it's tempting. [chuckles] Stuart: Really? Gary: Sure. Stuart: Sure? But... that... So, you're cool with this? Gary: Yeah, she can't stand me. Denise: I can't. [chuckles] Stuart: Uh, so why stay together? Denise: Hmm. Well, if I leave, then Gary would be upset. Gary: Traumatized. Denise: And we've learned not to upset each other. Gary: 'Cause it hurts. [points to the device in the back of his neck] Denise: Ouch.