Psychology dating men
They may seek the sexual vigor of the young, which partners of their own age group may no longer possess.
Mail-order brides have been frequently younger than their husbands.
Age disparity in extreme cases may be seen as dysfunctional (a paraphilia) if such relationships are pursued to the exclusion of all others and to the detriment of the partners.
The term alphamegamia can be used when a person is sexually aroused by partners of a different age group, and "chronophilia" can describe a sexual fixation on members of a different age group.
In keeping with modern American mores, a folk formula (sometimes referred to as the Trophy Rule) seems to have evolved so as to compute correct disparities of age between older and younger partners, this being "divide by two and add seven", that is, the younger partner in a relationship should be at least seven years older than half the older partner's age, else the relationship is liable to be subject to moral disapprobation.
The United States Census Bureau's March 2000 statistics show that only 800,000 unmarried American couples are more than five years divergent in age, and 7 in 100 of women who have married more than once have a husband six or more years younger than they.