Erasmus is an exchange program for students in the European Union and other great countries (let say… TURKEY!). Disguised as a learning or cultural exchange program, it is just a libertine and sexual exchange program.
When your girlfriend, daughter, sister goes to an exchange program or an Erasmus to South America, Spain, Italy, etc. This is what is likely happening.
Do not ever fall into the trap of believing that any exchange program is there to make people better, smarter or more educated. It is only there to waste their time, destroy their dreams and trash their emotions.