When Jace gets dark urges to be bitten and kissed, fucked and used, it's Simon he goes to. Like an addict looking for a fix to hit the right spot he keeps on coming back for more.

He can feel them both everywhere, standing between the two of them like this. He can feel the way the sweat drips down his back, Simon’s breath on his back, the hard surface of the boat under his hands.

Alec doesn’t know what he’s doing. He knows that Magnus knows he doesn’t know, which kind of makes it better — there’s no expectations, just the smile on Magnus’s lips when Alec surges forwards to kiss him — but somehow it makes it worse as well, because he’s following his instincts and his instincts, apparently, involve letting Magnus do anything to him. And, okay, that idea is unfairly hot (there is nothing Alec wouldn’t give to have Magnus pin him down and just take, but his boyfriend is far too nice and too conscious of Alec’s apparently soon-to-be-gone virgin status to even try to) and unfairly unattainable, but Alec’s first response to being pushed onto Magnus’s bed is still to get his wrists up.