Plot: Sifuentes's plan to use the zoo as a teaching tool for giving Stulwicz some sex education has unexpected benefits for two of its residents; Melman's new boyfriend gets arrested for insider trading, placing her, Kelsey and Perkins in jeopardy for acting on his tips; Becker's scorched earth policy on divorce settlements leads to near tragedy for a client's family, which prompts him to reassess his strategy for handling Brackman's divorce.