Token resistance to sex

39.3% of the women had engaged in token resistance at least once. 
We investigated whether women ever engage in token resistance to sex—saying no but meaning yes—and, if they do, what their reasons are for doing so.We found that 39.3% of the women had engaged in token resistance at least once. Their reasons fell into three categories: practical, inhibition-related, and manipulative reasons.It could, however, have negative consequences, including discouraging honest communication, perpetuating restrictive gender stereotypes, and—if men learn to disregard women's refusals—increasing the incidence of rape.
Muehlenhard, Charlene L - Journal of Personality and Social Psychology

http://psycnet.apa.org/journals/psp/54/5/872/