Dr. J a.k.a. Dr. Jennifer Roback Morse of NOM's Ruth Institute comments in The Daily Caller about a new study on devaluing effect of casual sex:

“Dr. Jennifer Roback Morse, founder and president of the Ruth Institute, a marriage advocacy group, told The DC that some young women are already confronting the challenge with pledges of chastity.

“’[The study] is quite correct that the presence of some women willing to have casual sex puts pressure on all the women to compete by having casual sex themselves,’ Morse wrote in an e-mail, adding that on college campuses some are forming chastity clubs and others are working with groups such as hers to confront the marriage issue head on.”