Will: Nico, have you slept today?
Nico: ...no
Will: YOU NEED TO SLEEP!
Nico: ...no
Will: Have you eaten today?
Nico: No
Will: Eat something!
Nico: No
Will: At least a fruit!
Nico: Fine
Will: *throws an apple at Nico and he caught it*
Everyone: GASP!!!
Nico: What?
Annabeth: *sly grin*
Nico: What is the apple poisoned or something?
Will: Nope.

(Because in Ancient Greece, throwing an apple to someone is proposing to them. If they catch it, that means they accept the proposal.)