I don't know if it's been explained, but it has been discussed. Fruit seems to play a role in all three GFs. It may have been just something that FFC picked up on from a scene or two in GFI and decided to preserve its life throughout GFII & III.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
