All valid criticisms. You're right, if it were an academic article I'd never get away with it, but I decided to take a little more leeway with my blog post. I hoped my readers would be astute enough to take my implication of an obviously false causality as tongue in cheek and just appreciate the very cool correlations. You obviously feel differently - I'll try to be more responsible in my future posts.
On the topic of financial satisfaction != amount of money, that's very true, and opens the door to all kinds of alternative theories about what causes the correlations. Unfortunately, the salary data included with the GSS isn't very good, so if you want to argue that maybe financially dissatisfied young people are having more sex because of a different confounding variable (they tend to be risk-taking maximizers or something like that), there's not much I can say to argue with you.
On the topic of financial satisfaction != amount of money, that's very true, and opens the door to all kinds of alternative theories about what causes the correlations. Unfortunately, the salary data included with the GSS isn't very good, so if you want to argue that maybe financially dissatisfied young people are having more sex because of a different confounding variable (they tend to be risk-taking maximizers or something like that), there's not much I can say to argue with you.