Nearly 30 percent of men and just under two thirds of women admitted to having faked orgasm before to keep their partner from being hurt, a recent poll showed.
The most common reason among both sexes was the fact that their partner was on the verge of orgasm as the reason they faked their own. Other reasons included wanting the whole thing to end, or they were bored and weren't sure an orgasm was a likely prospect.
Conducted by researchers at the University of Kansas, the study questioned 281 male and female students about their sexual habits.
It revealed that many - and in particularly, men - faked orgasm when there was too much pressure to enjoy sex.
Women, on the other hand, might opt for a fake orgasm as they might find it difficult to orgasm from penetrative sex alone, sex expert Tracy Cox observed.
The report, published in the Journal of Sex Research, noted that this pressure to experience "earth-shaking orgasms" can mean both men and women try to pretend this is the case.
The good news is that, fake or not, those respondents in a study by Leeds University who said they were vocal during sex and orgasm tended to report a better sex life than their quieter counterparts.
In particular, women tend to respond well to a vocal partner.