The necessity and acceptability of sex education has remained a controversial issue for many years and does not have a unified solution and a right standard even in those countries, where sex education is a part of the compulsory school curriculum. Even in the absence of special training and fixed standards teachers of some school subjects face issues related to sex education in their professional practice almost every day. This study examines current discussion strategies on topics related to sexual education at school lessons in Russia, as well as tactics used when answering questions related to such topics, in case teachers witness situations with such implications. The paper has a high-quality design and is based on data from in-depth interviews with 23 teachers from 7 regions of the European part of Russia. The sample includes teachers of Biology, Literature, Social Studies and Physical Education who frequently encounter issues of sex education in their subject area.