Prenuptial agreements are often proposed and negotiated between parties when either or both are entering a second marriage, where one or both have children from a first marriage, and/or where one or both have substantial premarital assets--separate property--over which each wishes to retain control and possession.
The Boston Globe publishes an article on May 6, 2007, however, pointing out
that a prenup may also be something to be considered by a couple intending to
enter a first marriage, particularly if the parties do not share the same
financial goals or ideals.
You can read the Globe article here: Anxieties surface as couple considers tying the knot