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According to the NCHS's William Mosher, the average age for first-time sex for women is between 16 and 17.
What's different about the Hutchinson-Stodden marriage and the Cox-Catsimatidis wedding is that the grooms were willing to enter so publicly into relationships with teenagers, with the apparent approval of their brides' parents.
For many women, though, these relationships look very different in hindsight.
In 1999, Lynn Philips conducted a well-known study for Planned Parenthood in which she interviewed teenage girls mostly between the ages of 14 to 17 who were involved with men ages 21 to 29.
But experts seem to agree that in contemporary American society the potential harm to a young woman depends on both on her age and how big the age gap is with her partner.