Perry x Lara Love

The "Too Young" Line
Linda: Candace, seriously, isn't Phineas a little young to be a rollercoaster engineer?
Candace: Well, yes. Yes he is.

Ferb: Or you could say "seize the day" was English for "carpe diem."
Phineas: Yes. Yes you could.

Ferb's Line
Ferb: Hmm, what assurance would we had that everyone else will also break into the song and do the same thing?

Phineas: I don't know. I think they probably will.
Ferb: Fair enough, I'm in.

Isabella: That was great, Phineas! So, what are you gonna do tomorrow?

Phineas: Well, you know what they say- carpe diem.
Isabella: Excuse me?
Phineas: Carpe diem. It's...