Following a bogus report that her "butt implants had exploded on an aeroplane", the voluptuous reality star told Heat magazine she's sick of people gossiping over her glutes. "I don't get the fact, like, why it's talked about. I don't get it," the 31-year-old moaned.
We don't really get it either, so we asked some clever scientific people to help answer Kim's question.
It's all a matter of mathematics, according to Associate Professor Matthew Rockloff, Deputy Director of the Institute for Health and Social Science Research at CQ University.
"What people, and particularly men, respond to is an ideal hip-to-waist ratio," Professor Rockloff tells TheFIX. "A lot of women have a large butt, whereas many fewer have an ideal hip to waist ratio."
So ladies, you can have a big bum just like Kim's, but you'll also need large hips and a tiny waistline to pull it off. Damnit!
"Research has shown that an ideal hip to waist ratio of 0.7 for women is strongly correlated with fertility," Professor Rockloff explains.
"In our distant evolutionary past, a potential mating partner with the ideal hip-to-waist ratio would have been a good bet for producing viable offspring," says Professor Rockloff. "As such, men have evolved over time to desire such a characteristic, whereas women either have it, or envy it."
Psychologist Vivienne Lewis agrees. "The emphasis on Kim's buttocks started by men's attention to what is typically seen as an ideal female figure by men, curves and indicators of fertility such as larger hips and buttocks," says Dr Lewis. "She's seen as a symbol of fertility and therefore sexually attractive to men."
Kim can thank her famous curves for launching her career, but she's still pretty, er, bummed that her trademark trunk gets so much press.
Sociologist Dr Michael Flood says unfortunately that's just par for the course for famous women. "In our culture, women's bodies in general, and female celebrities' bodies in particular, are under intense surveillance," he says. "Your buttocks are one key marker of your status and your worth."
"I imagine that ordinary people admired Nefertiti's caboose way back when," speculates John Malouff, Associate Professor of Psychology at the University of New England.
And even Nefertiti would have had her haters, just like Kim.
"We humans improve our view of ourselves by identifying with celebrities like Kim," adds Professor Malouff.
"When they win in some way, we win. When celebrities fail in some way, some of us who do not identify with those specific celebrities improve our view of ourselves by thinking that at least we don't have that problem. We feel superior to a celebrity!"
So there you have it, Kim. Your butt is such a hot topic that even academics have an opinion on it.
Next topic: Who's going to write a Ph-double-D dissertation on Kim's boobs?