Der Schlampen-Reflex

Sheldon and Leonard are sitting in the canteen. Sheldon is still feverishly pondering over what Raj and Penny had done in his room. Because it shouldn't have been made to look like that afterwards, He then made wild assumptions about it. Leonard made him feel attentive, because Penny probably lied about it.

Raj and Howard sit down with them. The situation is tense. Sheldon starts a conversation about a paintball tournament for the faculty, which takes place the following weekend. He would like to set up a chain of command in the group and would like to set how many ranks above the others he should stand. There its burst out of Leonard and Howard and they make Raj apologize for his alleged affair with Penny. Raj claims that he and Penny were in love, but the guys don't believe that.

Penny is just pouring herself wine into  a measuring cup, as Amy knocks. Penny blames herself both for hurting Leonard as well as Raj. Amy comforts her with the story of Catherine the Great, who had an affair with a horse.

Bernadette confronts Raj in a rage. Since Howard found out that Raj had written a poem about her, he now believes they had an affair. Bernadette demands an apology from Raj

Penny tells Amy about her childhood in which she showed all the boys her underwear when she was rejected. Amy comforts her with the fact that Penny can not be blamed for her skank reflex. Penny wants to go out with Amy, but when she opens the door, she meets Leonard and Sheldon and changes her mind. She would like to stay a few days with Amy

Leonard shows himself to Sheldon in the camouflage for the Paintball tournament. Sheldon is delighted. However, Leonard is not in a good mood and therefore Sheldon has organized a chat with his mother. She would like to help Leonard to cope with his problem. Leonard says, that he not come to terms with the affair of Penny and Raj and because of Priyas departure back to India, he is feeling downcast. These words had only little comfort.

Penny and Amy comb their hair and Penny complains about her lack of success as an actress. At that moment Raj knocks, he would like to speak with Penny He would like to arrange something with Penny, but when he notices that Penny is not interested in him, he explains to Penny they did not have sex that night. Penny is relieved. Raj asks her to keep quiet about that. Rather he would like to tell his friends that they decided together to break up.

The boys are in the middle of the Paintball tournament. They discuss their plan But the boys however have no more joy for the game. Sheldon responds stunned and puts himself unarmed in front of his opponents. He wants to die in action As he is being bombarded, the guys storm over and take up the fight. Sheldon is satisfied

In the apartment the guys celebrate their victory together. Penny comes in and wants to apologize. Raj interrupts and declares their affair to be over Penny tells the guys that she wants to return to Nebraska. At that moment, she gets a call that she got a commercial for hemorrhoid cream. Cheerfully she leaves the apartment.

In the final scene they all sit together in the apartment and watch Penny's commercial.