According to my dad it doesn&#x27;t go away.<p>When I got old enough to go out places with my friends and come home later at night (past 11, for example) my dad said it took a couple years before he could fall asleep without hearing the garage door open, and he&#x27;s a <i>deep</i> sleeper who&#x27;s never had any issues sleeping anywhere.<p>We&#x27;ve joked he&#x27;s going to miss his own funeral because he&#x27;s slept in.