Admiring another woman’s looks could have an underlying meaning, because according to recent research, 60 per cent of heterosexual women find other women sexually attractive.

The latest findings from the Boise State University, discovered that over half of the 484 straight women questioned, had been attracted to another female at some point in their lives – with a further 45 per cent admitting to kissing a woman and 50 per cent confessing to enjoying fantasies about other ladies.

“Women are encouraged to be emotionally close to each other. That provides an opportunity for intimacy and romantic feelings to develop,” says Professor Elizabeth Morgan from the study.

A previous study found that the chances of a woman being attracted to other women increases as she get older.

Following on from the findings at Boise State University, psychologist Lisa Diamond from the University of Utah, discovered that sexuality develops over time. Of the women she questioned, many of them changed their sexual preference from heterosexual to ‘unlabelled'.

“We have this idea that sexuality gets clearer and more defined as time goes on,” Lisa Diamond told the Daily Mail. “We consider that a sign of maturity to figure out who you are. I've seen it's really the opposite.”