Zac Efron starring in '17 Again'Think of your favourite male film star. Is he a macho, muscle-bound strong man, or more of a charming but boyish chap?

Chances are, you're thinking of the latter and there is no doubt that these days our taste in men is changing.

But it's not just down to the Hollywood casting agents that the more feminine man has become so appealing.

Scientists now say that it could be the contraceptive pill that is changing women's views on what is or isn't attractive in a man.

Apparently, and this is news to us... boffins have known for some time that a woman's taste in men changes during her menstrual cycle, but with the Pill playing havoc with our hormones, it could be influencing our choices more than we thought.

Previous research has revealed that when a woman is ovulating, she will tend more towards a man's man, with masculine features and assertiveness the priority.

But for the rest of the month, it's the caring sharing every-so-slightly feminine types that we prefer. For those on the Pill, those masculine-preference days are gone.

And that's where things start to sound more serious.

Dr Virpi Lumma, co-author of the study, said: "The ultimate outstanding evolutionary question concerns whether the use of oral contraceptives when making mating decisions can have long-term consequences on the ability of couples to reproduce.

"If this is the case, Pill use will have implications for both current and future generations, and we hope that our review will stimulate further research on this question."

With the likes of Johnny Depp and Zac Efron currently topping the box-office charts, it looks like the tough guys will have to take a back seat.