Nick's rapport with the students prompts Emerson to ask him to teach a seminar on human sexuality. However, Nick encounters trouble when the kids' desire for a frank and honest discussion conflicts with the strict guidelines of the school district. In particular, Tasha craves advice because her boyfriend Trey is pressuring her to have sex with him. Nick closes the door and tells the students what they need to know. Later, Tasha's parents mistakenly think that Nick has told Tasha that it's okay for her to have sex. But Tasha and her boyfriend actually listened to Nick's advice to wait. Meanwhile, Miles is grateful when Marco defends him from a school bully. But when Miles later purposely seeks out a confrontation with the bully, Marco refuses to help Miles, teaching him not to take advantage of a favor.