zugzwang
'zəgˌzwaNG,ˈtsoogˌtsvaNG/ noun
this is a chess term in which the obligation to make a move in one's turn is a serious, often decisive, disadvantage; about to lose
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EROS
a passionate physical and emotional love based on aesthetic enjoyment; stereotype of romantic love
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Jason and Piper, no matter how troubled or shaky the foundation of their relationship may be, always seem to have time to fluster each other.
On the occasion that brushing shoulders or holding hands don't cut it, an ambush peck somewhere on the cheek or nose or forehead or fingers usually embarrasses Piper to the point of threatening to beat him to a pulp.
Jason happens to think it's the cutest thing in the world.
She always takes revenge, of course.
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LUDUS
a love that is played as a game or sport
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The fact that there are still some people out there who believe they're together because they can be seem to always ignore the fact that they're together because they want to be.
If love was a game—well, Jason would go ahead and return it for cash since there really was no winning there.
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STORGE
an affectionate love that slowly develops from friendship, based on similarity
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During the earlier days when they forget they're supposed to be in love, Piper punches his side and he sneaks in a crappy joke and sometimes it's a lot easier to be best friends rather than a girlfriend or boyfriend, but who ever said you couldn't be both?
In particular, Jason enjoys the newer addition of kissing his best friend. Leo, however, protests the inclusion of every best friend.
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PRAGMA
love that is driven by the head, not the heart; undemonstrative
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Sometimes Jason wonders if he was born an Athena kid, then maybe he'd be a little smarter about loving Piper.
Maybe he'd be a lot less aggressive knowing her whereabouts to make sure she wasn't getting eaten by a drakon or maybe he wouldn't have to go through a ridiculous amount of emotions just watching her fall down during a sparring session (surprise, fear, anger, regret, panic), or maybe he'd remember how to breathe when she'd walk in the room.
Maybe he'd stop giving her everything he was and maybe she wouldn't leave him so vulnerable. Maybe she'd stop doing the same.
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MANIA
obsessive love; experience great emotional highs and lows; very possessive and jealous
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It's not exactly jealousy that makes him tighten his hold on her hand every time they pass by boys whose gazes should be directed a little higher up than lower or greed when he prefers smaller gatherings to larger ones for them to attend with a dress as form-fitting as hers.
The only deadly sin he could be accused of is pride, because there was no way in Tartarus Piper would leave him for anyone who doesn't love her as much as he does.
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AGAPE
selfless altruistic love
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Rather than on a battlefield, Jason is caught off guard to realize it was actually at 3 o'clock in the morning waking from a death-inclined nightmare when he knew for sure he would die for Piper McLean.
Opening his eyes to her mess of hair and specks of dried drool on her chin and soft snores and breathing—every sign that she was alive and well and here with him, Jason understood they would both want him to live for her instead.