We all experience a first kiss, first partner, first sex, marriage, home, career, child, divorce, etc.
This Dating Age Range Calculator just a fun tool to predict your dating age.
From another point of view, the chart can be interpreted as saying that there should not be an age disparity of as much as five years unless the younger person has an age of 19 or more, a ten-year disparity should exist only if the younger person has an age of 24 or more, and a twenty-year disparity should occur only if the younger person has an age of 34 or more.
(And people only slightly older than 14 should only be involved with those almost exactly the same age as themselves.) To read the chart, go to the position along the x-axis which corresponds to your age, and the green range (between the black and red lines) directly above that position corresponds to the range of your partner's ages which is deemed acceptable by the rule.
Half your age plus seven rule states "never date anyone under half your age plus 7" also meaning that "no one under 14 years of age should date".
Men, in contrast, are hypothesized to be most attracted to women in their reproductive prime, which tends to be when they are younger.