Most women are either bisexual or gay but "never straight", a study suggests.
Research has found that though lesbians are much more attracted to the female form, most women who say they are straight are in fact aroused by videos of both naked men and naked women.
The study, led by Dr Gerulf Rieger from the Department of Psychology at the University of Essex, involved 345 women whose responses to being shown videos of naked men and women were analysed.
The results, which were based on elements such as whether their pupils dilated in response to sexual stimuli, showed that 82 per cent of the women tested were aroused by both sexes.
Meanwhile of the women who identified as straight, 74 per cent were strongly sexually aroused by videos of both attractive men and attractive women.