When one learns a language, it is only natural to start with the basics and often slightly deviate from the Puritan way and see what sex looks like in the foreign language. People in their twenties go as far as first learning the bad words and then the good ones.
Naturally, sex is often a topic in the exchange among foreign students in a university away from home. “How do you curse in your language?”, “How do you say sex?”, etc. In some languages, this is pretty straightforward – meaning many languages use the English word (for the act, not the gender that is). In others, the difference is huge.