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Jay Leno: This is what makes a car sexy

What is the sexiest car ever made?

It's a fun question with no correct answer. Though oddly enough, science has accurately determined that the least sexy car is a PT Cruiser. That's a 100 percent true fact.

Maybe.

But while opinions will always vary on which of history's cars are the sexiest, most collectors and critics can agree that some cars are more attractive than others.

Jay Leno, host of CNBC's "Jay Leno's Garage," explains why some vehicles have a certain je ne sais quoi and others don't: "The sexiest cars are the ones that have both the male and the female accent to them."

He cites the Jaguar XK-E as a classic example, noting that Henry Manney from Road & Track magazine even once called it "the greatest crumpet-catcher known to man."

(Note: Across the pond, "crumpet" refers to either a griddle-cooked muffin or a sexually attractive woman. Using context as our guide, we can assume Manney was referring to the latter.)

1964 Jaguar XK-E Roadster
Tom Brakefield | Getty Images
1964 Jaguar XK-E Roadster

Leno describes the Jaguar XK-E as a feminine car with masculine overtones. Or, he says, it is a masculine car with feminine overtones, because it's a bit like a cat, with feline accents and sensuous curves.

"Good designers manage to capture that," he says.

Leno's personal favorite car from the '80s is the Lamborghini Countach. But he admits that it is, perhaps, over-the-top masculine.

He says, "I rarely meet a lot of women who think the Countach is attractive." Its edges are too sharp.

Leno believes that the Lamborghini Miura is, perhaps, more appealing to women. Maybe that's because, from the front, it looks cute, as though it's smiling. On some models, the headlights actually appear to have eyelashes.

1970 Lamborghini Miura P400s
Heritage Images | Getty Images
1970 Lamborghini Miura P400s

Attractive to some, unappealing to others. As Leno says, "It's all in the eye of the beholder."

CNBC's "Jay Leno's Garage" airs Wednesdays at 10 p.m. ET.