@kickycan,
if it's the wrong person then most probably there would be no rewards (unless you consider sex as one), however, if it's the right person, every second is a reward, my parents had been together for 44yrs and going, now that my brother and myself left the house they still have each other. When you're young freedom is what life revolves about, never the less, once you start growing older, your priorities change, you want someone to share your stories with, someone to share a life with, to have kids with and to watch them grow into successful people who puts a smile on your face, you want a story to tell, you want a legacy, you want someone who understands your needs without you talking about them, a person to trust with your life, sure there are challenges (raising the kids, mortgage, daily problems, life routine, etc...) and you need someone to assist you through them. LTR are great if you're with the right person, however, if you're with the wrong one, you're screwed.