Illustration: Jen Troyer
Not even scientists can agree on what percentage of women regularly climax, or how or even why. But it's generally accepted that roughly a third of women are unable to have orgasm through any means, says Cindy M. Meston, PhD, who was the chair of the World Health Organization's 2005 orgasm committee (yes, there was such a thing). Recent research has confirmed that anatomy plays a role: Some women are just born to orgasm—and some have to work at it. A study published last year in the journal Hormones and Behavior confirmed that the shorter the distance between a woman's clitoris and vagina (less than 2.5 centimeters is ideal), the easier it is for her partner to stimulate her supersensitive areas (tools and toys can help bridge the gap). Regardless of how we're built, almost every woman is aware of the other big challenge: Orgasms tend to require more constant attention—about 20 minutes, studies show—than most busy people have the time or concentration for.