According to Trunk:

It is well known in the sex research arena that the more educated a woman is the more often she will receive oral sex.

God, you gotta love college, right? And once you've gotten a guy to do that well, you're not exactly inclined to give it up.

Since well-educated women tend to make more money, Trunk suggests it stands to reason that women WHO make more money receive more cunnilingus as well — in addition to the fact that high-earning women tend to live in big cities, are (supposedly) sought-after for dates and interested in men who are good in bed.

Trunk's (male) editor added this:

"Let's assume that men give oral sex only because women ask for it. That's probably 95% true. Then who asks for it? Women who consider themselves at least equally deserving of that sort of consideration -the women who are going to be better earners because they are educated enough to know that they deserve it (both the income and the oral.) So I think they are coincidental, not causal. A woman who earns more has the self-confidence (and the self-worth, boosted by external factors like earning ability, education, etc.) to ask for oral."

Actually, that's an interesting argument, with which I have one very large quibble. Most of the damn time, I don't have to ask for oral sex. In fact, I'd say that he's got the numbers completely wrong, at least in my college-educated, high-earning single experience: 95% of the time, the guy offers, requests or just heads on down there to eat me out. (Maybe it's because I have better luck picking lovers than boyfriends?)

Statistical quibbles aside, I think it's worth noting that societies that allow and even encourage women to achieve educationally and professionally are also societies in which women have (some and increasingly more) autonomy over their lives and their bodies. If you are free to pursue your own life, your own career and your own relationships, then you are also more and increasingly free to pursue sexual pleasure. So, I'd agree with Trunk's editor that while there is likely a statistical correlation between women's income level and cunnilingus rates, the correlations is probably due more to the fact that these women are increasingly less likely to take up sexual roles proscribed by traditions that specifically discourage them from outside employment and equal earning power.

That said, in the spirit of full disclosure, I did receive the most oral sex per annum the year I made the most money, but that was because I had a boyfriend at the time and he had a few things to apologize for.

High-Income Women Get More Oral Sex. Maybe. [Brazen Careerist]

"Only when couples understand the source can they avoid the mistake, which is thinking any growing distance between them is a relationship problem," Dr. Ruth counsels. In addition to open lines of communication, Dr. Ruth also prescribes naked snuggling. "Even if a couple doesn't feel like making love, they should make an appointment, take their clothes off and climb into bed together. Most of the time this will be enough to get them started," the good Doctor notes.

And speaking of recession sex, there is a super sad personal essay on Nerve.com from Sarah Hepola about a one night stand with a transactional lawyer. She and the lawyer had a steamy night of multiple orgasms, and she did not hear from him again…until several days later, when he sent the following text: "I lost my job this week. I lost all my money in the stock market. I think my mom is seriously ill, and I'm probably moving back to Florida later this week. I don't think we can date right now." Oh. shit. Some of Hepola's friends believed that the guy was lying, but like Sarah, I choose to believe him. How awful!

You guys, there's also this article from Time about how the recession may or may not make you get a divorce, but honestly I need to pull back from this ledge of romantical despair!! To sum it up, basically your unemployed husband is totally going to get obsessed with online porn to distract him from the terror of his real life and then once he's totally broke he'll divorce you, because then you won't get any of his precious money. Or something. Seriously I couldn't get through it without wanting to die. Let's all just look at the nice picture of Dr. Ruth and think happy thoughts instead.

Sexual Recession [Forbes]
How The Financial Crisis Ruined My Love Life [Nerve]
Will the Market Kill Your Marriage? [Time]

Earlier: Dr. Ruth Personally Advises Us On Period Sex