The students from the University of Mannheim in south-western Germany say they are champions of female sexual emancipation.
“We are focusing on female students in particular, because they generally come out badly after one-night stands,” the Daily Mail quoted Christopher, 21, as telling Der Spiegel newspaper.
“What’s more, girls who just want to have some fun are often labelled as sluts,” he said.
The trio, who do not want their real names published and are identified by Der Spiegel as Christopher, Oskar and Markus, have plastered their university’s campus with ads for their service.
They have dubbed their project Bib:Love - a play on the German word Bibliothek, meaning library - and their slogans promise “Good grades through Good Sex”.
Although many of their fellow students greet the signs with roars of laughter, the men say they’ve already had lots of emails from students who want to find out more.
They tell correspondents that regular exercise, like lovemaking, brings health benefits and helps with studying.
Female students who are drained and fatigued from evenings spent in the library are encouraged to send an email. Then one of the trio will meet with them.
If the chemistry is right, the meeting ends in sex. But the men reserve the right to withdraw their service if their client’s appearance is not promising.
Christopher, Oskar and Markus claim they have so far received 82 messages at the Bib:Love email account.
Of these, they say, nine have resulted in bookings. They claim they have had five one-night stands through the service so far.
The men behind Bib:Love present themselves as service providers with a sense of humour. The idea for the project came to them during a drunken night last autumn.
However, Der Spiegel points out, despite their claims to be champions of female sexuality, the free brothel service they are offering is far from revolutionary.
Christopher admitted to the paper that unusual sexual practices are not catered for.
“Bib:Love is essentially the typical one-night stand, albeit a much better-marketed one,” said reporter Selina Marx.