Scott Disick, 37, and Amelia Hamlin, 19, dating called 'weird' and 'sickening' because of age difference. Why do we care? - Yahoo Lifestyle

“I didn’t go out looking for an age gap or someone really younger than me...You have no control over who you fall in love with,” he told The Guardian last year.

And curiosity doesn’t wane when women skew younger — fascination with the romance between Sarah Paulson, 45, and Holland Taylor, 77, is “surreal,” Paulson explained in a New York Times interview; Fifty Shades of Grey director Sam Taylor-Johnson, 53, once said entertaining opinions on her marriage to actor Aaron Johnson, 30, would make her “the unhappiest person.” While last year, Kate Beckinsale, then 46, told the Los Angeles Times, "I’m surprised by the interest” in her 20-year gap between her and ex-boyfriend Pete Davidson, then 25.

A January study by the Pew Research Center that examined global household living situations found that on average, women are younger than their husbands or domestic partners, regardless of religion, with larger age gaps in African countries and narrower fields in Europe, the U.S.

Kuhle, an associate professor of psychology at the University of Scranton, tells Yahoo Life there are varying theories for the attraction between people of different ages (older men value the biological promise of younger women; younger men appeal to older women looking to “capitalize” on their declining fertility).

“We often question whether the older partner is taking advantage of the younger one due to the societal and financial capital they’ve had time to collect,” she tells Yahoo Life.