LiveScience, an MSNBC blog, reports on a study from Jessica Burris at the University of Kentucky on what correlates with sex for a sample of 353 undergraduates. Among other questions, Burris gave them a Spiritual Transcendence Scale measure (with which I am not otherwise familiar). This is the eyebrow-raiser:
For women, however, spirituality was the strongest predictor for the number of sexual partners, the frequency of sex, and the tendency to have sex without a condom.
Burris reads both spirituality and sex as ways women seek intimacy.
I am inclined to think that sexually loose college women get detached from the churches they were raised in, but didn't want to go all the way to atheism, so they stopped at "spiritual."
Either way, I hope someone follows up on this with a fuller study.