Ethan loves the sound of Danny's heartbeat.
He loves it when he has his head resting on Danny's chest, letting the steady thump of the other boys heartbeat lull him into serenity. He loves listening to it whilst Danny's asleep - just letting himself be enveloped by the human's warmth and love is enough to soothe him to his own sleep - the last sound he hears is the steady rhythm of his boyfriend heart.
Ethan loves listening to the way Danny's heartbeat picks up whenever they get a little hot and heavy. Sometimes he even thinks that the fast thumping of his boyfriend's heart is even better than the quiet moans he lets out and he adores those moans.
He loves the way Danny's heartbeat skips in his chest whenever he sees him. The sound makes Ethan grin uncontrollably - the kind of grin where his eyes crinkle and his nose scrunches up in what Danny describes as 'the cutest way possible'. It's a kind of grin that's reserved only for Danny, because he's the only person that can make Ethan's own heartbeat skip in his chest, not out of fear but out of love.
Ethan loves the sound of Danny's heartbeat because it's a constant reminder that he's alive. It's one of the most beautiful noises Ethan has ever heard. It's like music to his ears.
But the sound of Danny's heartbeat is a constant reminder that he is fragile and human, and it doesn't take much to break a human, or stop their heart. Ethan also fears every beat of Danny's heart. Because with every beat, it's a beat closer to the day Danny's heart stops beating for good.
Ethan dreads the day the sound of Danny's heartbeat stops.