- Heather: Sir, it is not necessary or wise to be naked.
- Professor Hubert Farnsworth: Pfft! You sound like my tennis instructor.
- Philip J. Fry: [after Leela decides to stay young] Goodbye, Leela. I'll come visit you when I'm all grown up.
- Turanga Leela: [whispering] Bring beer.
- Turanga Morris: No beer until you finish your tequila!
- Inez Wong: Ah, my Amy is sweet little girl again. This is like a mother's dream... bad dream, that is! At this rate, I'm never going to have a grandchild!
- Leo Wong: She may not be grown up, but she sure grow out. She fat!
- Amy Wong: Dad, if you're going to make fat jokes until I'm cute again, then I'm just going to stay in my room.
- Leo Wong: Stay in your room? You so fat, you to stay all around room.
- [the professor has been "youthisized" to age 53]
- Professor Hubert Farnsworth: Oh, now I'll need a fake ID to buy ultra-porn.
- Philip J. Fry: [on a boat race in the sewer] We miss the turn. We'll never catch up.
- Turanga Leela: Yes we will. This pipe goes under Planet Express, and it's 9:00 PM.
- [cut to Planet Express; toilet flushes]
- Professor Hubert Farnsworth: The devil take this predictable colon!
- Professor Hubert Farnsworth: At this rate, we'll keep getting younger until we suffer a fate worse than death: pre-life! Then death.
- Mandy: [about Fry] So this is the famous Fry. What is he, like, the biggest loser on the surface so he has to hang out in the sewer?
- Philip J. Fry: They're onto me.
- Hermes Conrad: Are you back to your original age, professor?
- Professor Hubert Farnsworth: Even older. Huzzah!
- Professor Hubert Farnsworth: I must find a way to escape the horrible ravages of youth. Suddenly I'm going to the bathroom every three hours like clockwork, and those jerks at Social Security stop sending me checks. Now I have to pay them.
- Turanga Leela: According to this, the fountain is located within the darkest, most ancient region of space, just past Teddy Bear Junction.
- Professor Hubert Farnsworth: Teddy Bear Junction. The worse scum hole in the universe.
- Philip J. Fry: It worked! We're our original ages again!
- Turanga Leela: I think I may even be a few years younger.
- Amy Wong: Hey, me too!
- [winks]
- Sal: [drops a single drop of iodine in a vat of sewer water] There's. Now the city's drinking water is safes for another day.
- Heather: In small doses, botulism tightens the skin, instead of killing you in the most gruesome way possible.
- Turanga Leela: Professor, teeth do not belong in your pants.
- Professor Hubert Farnsworth: Well, I can't keep them in my mouth. They're nuclear powered.
- Philip J. Fry: Ow! It bit me!
- Turanga Leela: No! No! It's tasted human blood!
- Heather: Sir, it's not necessary or wise to be naked.
- Professor Hubert Farnsworth: Oh! You sound just like my tennis instructor!
- Professor Hubert Farnsworth: [On being 'Youthasized"] But I like being old. I don't have to talk to my parents, no one asks me to help move their stuff, I don't need to understand today's "edgy" TV sitcoms...
- [while looking for the gargoyle Pazuzu, Farnsworth stops at a diner in Florida]
- Bender: Yo, Captain Catarats. Why are we stopping here?
- Professor Hubert Farnsworth: It's almost 2:30. Just in time for the early bird dinner special.
- Philip J. Fry: What about your gargoyle?
- Professor Hubert Farnsworth: The wha?
- Turanga Munda: What did I tell you about shedding your skin on the couch? Where do you think you are, the zoo?