According to Psychology experts from the University of Essex, straight women are strongly aroused by both sexes, even though they said they were only interested in men.
They found that women who class themselves as heterosexual were aroused by naked videos of both attractive men and women - whereas lesbians were far more attracted to the female form.
In contrast, lesbians showed far stronger responses to women and barely any when shown the men.
The researchers said lesbians were the most like men in their responses because it is usually men who show distinct sexual responses to their favourite sex.
The study was led by Dr Gerulf Rieger from the Department of Psychology.
'Even though the majority of women identify as straight, our research clearly demonstrates that when it comes to what turns them on, they are either bisexual or gay, but never straight,' he said.
'This shows us that how women appear in public does not mean that we know anything about their sexual role preferences.'
I can't help but wonder how they came up with this research topic, when there are more relevant areas to cover.....lol.
All the same, it's an interesting topic.