Geilenfeldt thinks an increase in airborne ardor has something to do with the higher percentage of women traveling on business. First-class cabins on weekdays used to be male strongholds.

Passengers riding up front have the feeling "that you're in an elite club," Huff says. And the idea that your seatmate is a person of substance can be a turn-on.

"It's not bad to fantasize, and it's not bad to flirt," she adds. "You just have to know your boundaries and your own morals. So that you don't do anything to damage your relationship."

The majority of frequent travelers probably play by those rules, and many vow that they never let lust come in for a landing.

Road Warrior Carl White of Alexandria, Va., maintains that the last thing he's thinking of is his libido when faced with a layover.

"If my plane is delayed or canceled," he says, "I am too busy trying to find a flight or a place to stay for the evening."
http://www.usatoday.com/life/travel/...2-flirting.htm