excitement prior to doing it with a stranger

In the city near where I lived , it was very prevalent among students at the university. Some girls did it for the money but a surprising number did it for the enjoyment/excitement. Often they operated from the flat they used for accomadation. I found it very exciting baring all with a girl who was a complete stranger. Some were game for almost anything and ended up almost becoming friends. A few even asked if I minded a female friend present to watch. As I neared my climax they'd even comment on what was happening and the friend could well masturbate in sync with me.