Throwing an apple at someone and they catch it is considered a marriage proposal in Greek Mythology.

You were talking to Leo, tossing an apple up and down in your hand.

"You know, to keep people away from me, I throw an apple at them." Leo tells you.

You grin. "Great idea!" You throw an apple at Percy and he catches the apple before it hits him. Percy stares at the apple, eyes wide in shock, before staring up at you. "Did you just-..." He mumbles. Leo and Jason highfive