This institution, located in Prague, is not only one of the premier sexological institutions in Europe, but in the whole world. The institute is famous as a pioneer in the field of sexological studies. One of the founders of the Sexological Institute, Kurt Freund, invented “phallometry”, which remains the only tried-and-true method for determining a man’s sexual predilections by examining the blood-flow to a man’s nether regions. And another initial member of the Institute, Dr. Vaclav Michal, was the first doctor to perform a surgical operation to cure impotence in the former Czechoslovakia in 1972.