EN
'Hook -ups'- emotionally uninvolved sexual encounters are becoming more and more rooted in popular culture, reflecting the changing social and sexual attitudes. Hook-up behavior may include a wide range of sexual activities such as kisses, oral sex and penetration. Hook-up raises the anxiety of many researchers due to many negative consequences, such as sexual violence, sexually transmitted diseases, emotional disorders and / or unplanned pregnancy. The aim of the study was to answer the question: how often do Polish and Ukrainian students take sexual relations with strangers?