Data from 965 female and 661 male study participants were used to evaluate the effect of an orgasm experienced during oral sex prior to the age of 18. Both men and women who had experienced an orgasm before 18 were significantly more likely (than controls) to have experienced an orgasm during oral sex after the age of 18 after adjustment for innate differences in individual's ability to reach orgasm during oral sex. Women who had experienced an orgasm before 18 were significantly more likely to report that oral sex was the easiest way to reach orgasm as an adult.