Developmental psychologist Michelle Drouin, who was not involved in the study, told "The" "New York Times" this finding is in accordance with theories in psychology and sociology based on biological evolution in that youth is a sign of fertility. She added that women with advanced degrees are often viewed as more focused on their careers than family. Licensed psychotherapist Stacy Kaiser told "MarketWatch" men typically prefer younger women because "they are more easy to impress; they are more (moldable) in terms of everything from emotional behavior to what type of restaurant to eat at," and because they tend to be "more fit, have less expectations and less baggage." On the other hand, women look for (financial) stability and education, attributes that come with age, said Kaiser. These findings regarding age and attractiveness are consistent with earlier research by the online dating services OKCupid and Zoosk. In an 2010 blog post, OKCupid observed that, "The median 30-year-old man spends as much time messaging teenage girls as he does women his own age." By analyzing data from between 2013 and 2017, OKCupid discovered that 61% what they called "successful" conversations, or those with "at least at four messages back and forth with contact exchange" took place between a man who was older than the woman. In half of these, the man was at least five years older. 2018 data from Zoosk revealed that 60% of men desired younger women, while 56% of younger women felt attracted to older men.