For example, different age preferences may be a result of sex differences in mate values assigned to the opposite sex at those ages.A study conducted by David Buss investigated sex differences in mate preferences in 37 cultures with 10,047 participants.
Thus, both sexes will have to compete and be selective in mate choices.
These two theories explain why natural and sexual selection acts slightly differently on the two sexes so that they display different preferences.
Another study also showed a higher divorce rate as the age difference rose for when either the woman was older or the man was older.
In August 2010, Michael Dunn of the University of Wales Institute, Cardiff completed and released the results of a study on age disparity in dating.
One of the concerns of relationships with age disparities in some cultures is a perceived difference between people of different age ranges.