Cut to Zack and Colleen facing off against each other in a game of Double Dutch. They're surrounded by children watching and cheering because apparently there is nothing better to do at recess at this school. Suddenly, Colleen trips up on the rope, giving Zack the win. His prize is that she kisses him on the lips. House says the fact that Zack had to win a bet to get Colleen to kiss him shows that he really doesn't know how she thinks. It also shows that whoever wrote this episode hasn't been a child in a long time -- when it comes to elementary school-aged children and kissing, it's the girl who always has to trick/bet/force the boy to kiss her, as he still believes that girls are gross. Zack explains that by losing the bet, Colleen could kiss him, which she wanted to do, while still acting like she didn't want to do it and thus saving face with her friends. Colleen denies Zack's reasoning, saying she only made the bet with Zack in the first place because she really didn't think she'd lose. And with that, she again nags House to tell them why Cuddy is mad at him. "It's stupid," House mutters. "Talk," Colleen demands. I don't know why he's taking orders from her; she can't even beat a boy at Double Dutch.
Cuddy unrolls a yoga mat. House walks in, putting his shoes on, and says he's leaving for work unless Cuddy wants to have sex with him or something. Again, all House is ever interested in when it comes to Cuddy is sex. He's shown more interest in the day-to-day activities of Cuddy's child than in Cuddy. Speaking of the child, Cuddy uses her as an excuse for why she can't have sex with House, saying she wants to get her yoga in before she wakes up. She asks House to take the garbage out on his way out, but he claims his leg is bothering him. He gives Cuddy a big kiss and leaves. Cuddy rolls her eyes and starts doing some deep breathing, only for the child to wake up and call for her. Cuddy carries Rachel to the bathroom, where she finds the toilet seat has been left up. Um... didn't House live with Stacy Frozenface for like five years? Surely he knows better. And he left the sink a gross, manly mess of toothpaste and beard hair, topped off with Cuddy's toothbrush, which he helped himself to.
The children are appalled, both because using someone else's toothbrush is gross and because House clearly doesn't listen to his girlfriend. House insists that he does listen to Cuddy. A lot. Case in point: she's calmly talking to House about why it bothers her when he uses her toothbrush when he retorts that maybe Cuddy and her four cavities shouldn't judge House's brushing habits, since he doesn't have any cavities. Plus, he's sure she'd rather that he brushed his teeth and flossed before dinner and after, I'm assuming he's hinting at, oral sex. She says he could just use the toothbrush she bought him. "Would you please just shut up and watch the movie?" he asks. Yeah, I can't imagine why she's so mad at him. Zack asks why House is so insistent on brushing his teeth before dinner. "You don't want to know. Yet," House says. He had no problem talking about sand in people's vaginas in front of these kids, but now he draws the line? Okay. "You're gross and dumb," Colleen says. Colleen is not dumb, though, as she's figured out that House only listens to what Cuddy says so he can use it to tell her she's wrong about something. House says if he doesn't tell her she's wrong, no one else will. She's the boss, so her day is spent surrounded by people who want to make her happy and kiss her ass. Clearly, House did not watch that episode all about Cuddy's day, where everyone from the insurance guy to the pharmacy tech treated her like crap. House says he respects Cuddy "enough" not to be nice to her. Zack says he likes House's line of thinking, as he believes he used it when he gave Colleen her black eye. House is shocked and possibly admiring, asking Zack if he punched her in the face. Zack answers with a flashback.