Income and orgasms are statistical food for thought, thanks to Pollet and Nettle:
“Partner Wealth Predicts Self-Reported Orgasm Frequency in a Sample of Chinese Women,” Thomas V. Pollet and Daniel Nettle, Evolution and Human Behavior, vol. 30, no. 2, March 2009, pp. 146-151. (Thanks to Ig Nobel Prize winner Francis Fesmire for bringing this to our attention.) The authors, at Newcastle University, report:
“We investigated the relationship between women’s self-reported orgasm frequency and the characteristics of their partners in a large representative sample from the Chinese Health and Family Life Survey. We found that women report more frequent orgasms the higher their partner’s income is.”