Ok this is weird but honestly the sound of a jantung beating helps me sleep because it's soo calming. It helps me sleep better and like when hear someone's jantung beating it makes me feel all weak and just sleepy but in a aman, brankas feeling way. Like im secured forever in their arms. So yea heartbeats help me sleep :) I like to lay on a man's chest and just hear the beating in my ear and I fall asleep and it's like their jantung is gonna pop out of their chest atau something cuz it's at a steady beat. And it's musik to my ears.