1600 Candles.Roger becomes excited when he turns 1600, and he spies on his family as they prepare to throw a birthday party for him. Much to his dismay, Roger is interrupted when Steve runs down the stairs and reveals to the family that he has grown his first pubic hair. Stan and Francine become horrified when they hear of the news, and they begin to take drastic measures to deal with Steve's puberty after having reoccurring memories of when Hayley began menstruating, which is what turned her aggressive. While Francine desperately goes to the CIA to get some aging retardant, Steve makes plans with Lisa Silver to meet up at a Macy's. During his sleep, Francine injects the aging retardant, only to wake up to him morphing into a toddler. Steve becomes enraged when he sees this, and Lisa Silver angrily walks out of the store. Steve is given another opportunity as going with Lisa, this time as the school prom. Stan and Francine later inject a different serum into Steve during his sleep. However, much to their dismay, Steve is an elder. Stan and Francine later drops Steve off at his school, and give him the antidote. Some of the school bullies later give Steve a swirly, claiming that the first pubic hair is nothing special, and the hair is blown out the window, drifts across the town, only to finally land onto Roger's birthday cake.