"The idea of thinking yourself to orgasm is not new. In the early 1970's, the Masters and Johnson research team documented the strong connection between sexuality and thought. The connection is particularly strong in women, says Dr. Ian Kerner, author and sex therapist. "The brain is the most powerful sex organ," he says. Men, he adds, have a much harder time making themselves climax without any touch whatsoever, but there are documented cases in women."