Women often don't care if their partners are young or not, but more about men's financial situation. Intimacy (Roland Miller) writes that because men have reproductive abilities as long as they live,

Women often don't care if their partners are young or not, but more about men's financial situation.

InTimacy (Roland Miller) writes that because men have reproductive abilities as long as they are alive, women have a huge investment in the upbringing of their offspring.

So they need to find a partner who can provide enough protection during a long pregnancy and lactation period, and will tend to strong men with rich resources and high social status, and will also prefer men who are slightly older than themselves.