You have to be sophisticated and devilishly fun at the same time.
Most of these men are looking for an escape from their daily lives, but also need someone presentable - you never know who you'll run into.
Ciara (not her real name) is one of 200 female students in Belfast signed up to the Seeking Arrangement website where rich men pay cash-strapped young women, known as sugar babies, thousands of pounds for their company, or more often, for sex.
A 20-year-old single mother, Ciara told Sunday Life she has been using the site to meet sugar daddies for the past-year-and-a-half.
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"I just thought, 'Maybe I'll get to go somewhere fabulous or on a few fancy dates.'" Soon, Abby was inundated with messages from men.
Before getting serious with Michael, she met up with six sugar daddies one 40 years her senior and although she dismissed two right away, she continued relationships with the others.
I currently have about ,000 in loans and more to go before graduation," says Abby, who has accepted about ,000 in cash from three sugar daddies, including Michael.
"This helps me out - it's useful in that sense." But the English student insists she draws the line at accepting cash for sex.
"Men have offered me cash for sex but as soon as that happened I cut communication because that's not what I'm there for," she said.
The attractive student said her sugar daddies have lavished her with gifts and treats in return for dates.
"It's really nice to be treated and to have those experiences of being taken out to nice places," Ciara said.
Lots of girls are jealous of Abby*, 19, a brunette business major in Louisville, Kentucky, for landing such an amazing boyfriend.