Dating is different when you get older. You're not as trusting, or as eager to get back out there and expose yourself to someone.
I am looking for someone that I can get lost in conversation with just as easily as we can share one of those moments of comfortable silence in each others arms. I love to laugh and joke around. My job is awesome, but I know when I come home that this is where my priorities and true happiness are.
People could rationally decide that prolonged relationships take up too much time and effort and that they'd much rather do other kinds of things. But most people are afraid of rejection.