Well yes, there is this image, that the successful older men, has a younger wife (and even younger affairs). But the average men has not. Hence serving the "fantasy" of the target audience.
But as far as I observe, this is frowned upon today. It still exists of course, many of the hollywood heros regulary change their 20 year old models for partner, but there is increasing criticism about it. I mean, my partner is 7 years younger and even this was met with criticism.
Criticism from whom? If it's your friends, get better friends. Other than that, it might be family - which is easily explained as jealousy (any success at all tends to get that response). Am I missing some hypothetical case where someone criticises you about the age of your partner and their opinion somehow matters?
But as far as I observe, this is frowned upon today. It still exists of course, many of the hollywood heros regulary change their 20 year old models for partner, but there is increasing criticism about it. I mean, my partner is 7 years younger and even this was met with criticism.