Younger men are intimidated by older women's sexual prowess, while the older men think it's great.
That's according to new research from a team of researchers at the Kinsey Institute for Research in Sex, Gender and Reproduction at Indiana University.
While it may be easy to lump all men together and all women together, the research shows that there really is great variety within the sexes.
Men who participated in the study were asked to relay the experiences on subjects including women's intelligence and the importance of what a woman smells like.
The study, published in the journal Archives of Sexual Behavior, involved focus groups of 50 men who were split up into three groups based on their age.
There was an 18 to 24-year-old group, while those aged between 25 and 45 were in one group and the over-46s in another.
Erick Janssen, associate scientist at the Kinsey Institute, said the results these men produced gave us insight into the varieties of male psyches.
He said: "We have a lot of assumptions about how men think and feel and behave sexually.
"We use all kinds of methods to measure men's sexual responses; in addition, we use questionnaires and surveys to ask about sexual behaviours. It's less common to sit down with men and ask them to talk about their experiences."
Among the results were the fact that older men tended to become more careful in choosing a sexual partner as they aged.
Women who had had a lot of partners were judged to be more threatening among the younger participants because they were worried about "measuring up".
But for older men, these women were a lot more attractive than those who are inexperienced.
Commenting on the study, Mr Janssen said: "One of the main conclusions of the focus group study is that, just like women, men are different.