Since the student body at the LSE consists of students from around the world, there does not exist a "typical" girl or guy in the superficial sense. On a deeper level, however, it is safe to say that the typical student is very dedicated to his or her work, which means, for the most part, students' primary interest is not the opposite sex. This is especially true amongst the postgraduate students, whose only concern is their studies. Postgrads, as well as upperclassmen, tend to pair off or remain celibate. In fact, a fair number of students, especially the postgraduates, have already sought out and found the stability of marriage. The higher up you get academically at LSE, the less time you have to focus on anything besides your work. As a result, coeds tend to relate to each other on an intellectual, as opposed to a sexual, level.
There is, however, a stark difference between the freshmen versus the upperclassmen and postgrads. Freshmen, who are thrilled to have finally made it to the University, want to celebrate. Most of the promiscuity and partying are carried out by first-year students or by the American students who are enrolled in the year-long "General Course."