For some men, the reasons are purely superficial. They enjoy having the beauty of a young woman around and feel they will experience a more adventurous sex life.
In terms of stature, an older man who shows up at a social function with a younger woman on his arm often feels a sense of pride and accomplishment. He has a piece of “eye candy” that other men might admire.
Other older men like dating younger women because the women bring out a sense of youth in their personality. While dating a younger woman, he may feel he is getting involved with more youthful activities that help him to feel invigorated and young again himself.
This is also an instinctual feeling as procreation plays a factor. Men intuitively want to spread their “seeds” to future generations. The best way to do this is to find a young woman who has many childbearing years left.
For women, the older man can be attractive when he presents himself as a more mature partner. After the college years, some women start to feel tired of the same old behaviors they find the men in their age group still enjoying.
As a result, they seek out older men who act with more sophistication and class. These men may be worldly, financially secure, and over many of the games they played in their younger years.
On the other hand, the women might be feeling the maternal instincts kicking in and want to start a family soon. Older men are more likely to settle down sooner and begin a family.