Fap less = Sleep less?

I've noticed that if I don't fap for a few days, I don't seem to need much sleep.  I sleep for 6 to 7 hours and wake up fully awake without needing coffee.  But if I fap a couple of times, I seem to need like 9 hours of sleep the following night.  What's up with this?

my girlfriend is a med student, and she recently found out that fapping when you're just hitting puberty stunts your growth...that's why I'm only 5'7", I fapped 24/7 when I was 12 :( :( :( :( :(