I've heard of Carbon credits but how about Shagging credits.
Berlin brothel offers discounts to 'green' clients
By Audrey Kauffmann
STUNG by the economic crisis, a brothel in Berlin has leapt on the "green" bandwagon and is offering discounts to clients who can prove they arrived by public transport or bicycle - with some success.
"Everyone's a winner," explained Regina Goetz, a former prostitute who runs the Maison d'envie (House of Desire) brothel in Berlin's Prenzlauer Berg, a district in the former East Berlin, which is a stronghold for the ecologist Green party.
"The environment is a topic on everyone's lips and it's pretty difficult to park around here. So we came up with the idea of an 'eco discount' of five euros ($7.40) to anyone who leaves the car at home," Ms Goetz said.