My lecture is a lecture on biology. Therefore we will not be dealing with venereal diseases or perversions but with perfectly normal sexual phenomena. From my experience during the past two semesters I know that most of my students, or about sixty percent, still live chaste lives. We will become familiar with many technical terms and foreign (European) words. On the one hand, using technical scientific terminology is unavoidable, and on the other, we use it to avoid making obscene associations … I expect you to be familiar with the textbooks in physics and naturalhistory and urge you to also take a look at the textbooks from girls' schools … I consider knowledge a product, lecturers like myself both the creators of knowledge and at the same time original researchers and brokers of knowledge.