Each new era of entertainment, from Old Hollywood to the Brat Pack, brings with it ever-changing perceptions of what is sexy. But over the last hundred years, some famous figures have had such undeniable sex appeal that it transcends fleeting fashions or beauty standards. Here are of the most timelessly attractive people to have ever walked the planet. Almost immediately she caught the eye of a young ish Hugh Hefner, and over the next decade, Wilkinson appeared in Playboy more than half a dozen times.

Want proof? Take a good look at the 20 awe-inspiring women below. They make or break trends. And with millions of fans following everything they do, these women are as savvy as they are sexy, their careers expanding into new territory all the time. But the faces to break a thousand hearts deserve our applause and more, especially considering that these women are actresses, singers, models and bona fide businesspeople. We could never pick a favorite.

Hollywood is full of sexy people that grace us with their killer good looks in magazines, on billboards, and on movie screens. But what makes some of them hotter than the rest? They say beauty is in the eye of the beholder but in the modern age of likes and followers, who really holds the title of the hottest girl in the world? Check out our list and see for yourself!

There can be enormous variation in sperm count in an individual, even over a few days. It is important that at least two, preferably three or more, samples are analysed, each at least two to three weeks apart. A single sample is inadequate to assess semen quality.