For example, this sample of 60-year-old men report that it is acceptable to fantasize about women in their 20s, which the rule would say is unacceptable.
But fantasies, of course, are not generally subject to public scrutiny and the rule is only designed to calculate what is socially acceptable —so this discrepancy is not necessarily a failure of the rule.
This rules states that by dividing your own age by two and then adding seven you can find the age boundary: Take your age, subtract 7, and double it.
So for a 24-year old, the upper age limit would be 34 (i.e., 17 * 2).
Women’s preferred minimum partner age: Below are the data from Buunk et al.’s (2000) study on women’s minimum age preferences; the rule’s age calculations are represented by the solid line.