Rich guys well past their prime have been plunking down money for thousands of years in search of a tryst or something more with women half their age -- and women, willingly or not, have made themselves available.With the whole process going digital, women passing through a system of higher education that fosters indebtedness are using the anonymity of the web to sell their wares and pay down their college loans.According to the United Nations Children's Fund (UNICEF), Sudan is home to more internally displaced persons than any other country in the world, with nearly 4.3 million people displaced after many years of conflict.

("Taylor" is the pseudonym she uses with men she meets online.

Neither she nor any of the other women interviewed for this article permitted their real names be used.)In her profile on the site, Taylor describes herself as "a full-time college student studying psychology and looking to meet someone to help pay the bills." Photos on the site show her in revealing outfits, a mane of caramel-colored hair framing her face.

Besides moving back home, many 20-somethings are beginning their adult lives shouldering substantial amounts of student loan debt.

According to Mark Kantrowitz, who publishes the financial aid websites and Finaid.org, while the average 2011 graduate finished school with about $27,200 in debt, many are straining to pay off significantly greater loans. This particular dynamic preceded the economic meltdown, of course.

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"Over the past few years, the number of college students using our site has exploded," says Brandon Wade, the 41-year-old founder of Seeking Arrangement.

Of the site's approximately 800,000 members, Wade estimates that 35 percent are students.

"College students are one of the biggest segments of our sugar babies and the numbers are growing all the time."Wade rewards students who use a email address to register on Seeking Arrangement by automatically upgrading their free, basic membership to a premium membership, allowing them to send unlimited free messages and granting them exclusive access to the site's cadre of VIP sugar daddies.