Had sex. Those two little words can sure elicit a reaction depending on when and where they're uttered. But what does "had sex" mean, anyway?

It seems that no one knows. In a new study from the Kinsey Institute at Indiana University, researchers found no consensus on what "had sex" means. They conducted a random, telephone survey of 204 men and 282 women living in Indiana. The respondents ranged in age from 18 to 96. Most were heterosexual.

Though 95% said penile-vaginal intercourse was having sex, 11% said it wasn't sex if there is no ejaculation. Thirty percent said that oral sex was not having sex. Twenty percent said anal sex was not having sex. Among older men (age 65 and older), 23% did not consider penile-vaginal intercourse to be sex...