LGBT: listening to girlfriends heartbeat made me fall asleep?

I'm a lesbian and i was visiting my girlfriend at her parents house and caitlin (my girlfriend) told me they would be gone for a couple of hours so that gave us a chance to catch up since i've been so busy with work we haven't seen each other in a month she's 19 and i'm 18 by the way. she was lying on the couch watching Superbad and asked me to join her so i laid next to her and put my head on her chest. i've always loved laying next to her but this was the first time i listened to her heartbeat. i think it was because i was so relaxed but i started to drift off. i quickly snapped out of it and she looked at me and said i think someone's getting sleepy and i told her it's your heartbeart i don't think i've felt that safe and warm in along time (at this point i could feel my face turning red when i said this) caitlin it's like your heartbeat is a lullaby only without words just a gentle hum. she saw i was turing red and started teasing me saying pat your blushing how cute. with that we laughed for a bit then she put a blanket over us and we slept for the rest of the night. i think caitlins heartbeat is one of the most beautiful sounds i've heard so if you have a story feel free to share but please no negative comments.