The graph is especially enlightening when compared to its parallel, on how women view men: Up to age 39, women prefer men's looks who are just about one year younger than they are. Even at age 50, 46-year-old men are looking good to women.
The graphic is based on data from the online dating site OKCupid, and Rudder is quick to note that these preferences don't necessarily mean 50-year-old men are actually dating women who can't legally drink.
"This is just measuring people's opinions, not what they actually go out and do," he told NPR. "What you see when you actually look at what people do, you see the realism set in. So these 40-year-old guys ... the people they actually have the courage to actually go out and message are a lot older: it's 30, 35-year-old women."
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Rudder also says the data reveal racial biases: "All the data on race I have is from dating sites, but on these sites black users, especially, there's a bias against them. Every kind of way you can measure their success on a site - how people rate them, how often they reply to their messages, how many messages they get - that's all reduced."