"Preliminary work has revealed that only about 7% of women always have orgasms with sex alone, he says, while 27% say they never do. The current research hold-up: developing a reliable, at-home technique for measuring C-V distance, especially one that can deal with stretchy skin. Women with a large C-V distance should not be discouraged, Wallen says. "Personally, I don't think the inability to experience no-hands, penis-only intercourse with orgasm says anything about a happy sex life," he says. "Maybe it could allow couples to be a bit more inventive in how they have sex.""