That article that Marmelade has posted is no longer relevant. Comments show that the article was written back in 2011.
Back then there were plenty of women, but things have changed in the Gerona area.
From the main highway that connects France with Spain (the AP7), you have several exits that lead to the popular holiday places on the Costa Brava.
The girls used to stand there, but the government wasn't very happy that all those families on their way to their holiday destination saw all these girls alongside the road.
So they started fining them and their clients. There are no women left