I believe what he says applies equally to "People who are unhappy alone."
"People who are unhappy alone are in a rush, impatient and driven by fear to lock <partners> down to a commitment before some other <person> comes along and steals them away." I know once upon a time, even when dating and sleeping with multiple women simultaneously--I had choices--I was in a hurry to lock-down a commitment. Rushing is definitely not the best way to find a great long-term partner.
