The takeaway: Men's happiness depends on having an emotionally-supportive relationship, while women's happiness depends on not being alone, period.
I agree with that on the guy's end of things. An emotionally-supportive relationship matters hugely to me -- it's a big reason why I had to pull the ripcord on my marriage with Exene: there simply wasn't that emotional support there; if anything, I felt like I was doing the emotional lifting for two people.