Female orgasm varies with relationship type

Women are more likely to experience orgasm in a relationship than in a hookup by Armstrong, England, and Fogarty. The downside to this paper is that they do not try to separate different types of orgasm, just take it as it one phenomenon. Still, an interesting dataset. Here is the link:http://asr.sagepub.com/content/early/2012/04/19/0003122412445802.abstract