Could someone please explain to me what is "naughty" about perfectly legitimate scientific/biological terms like sperm and vagina? Aren't we, by being squeamish about such things, teaching children that there is something wrong with that particular part of their bodies and that particular bodily function?
Frankly, I am far more offended by the almost-constant innuendo I find even in family-friendly movies. It seems that as long as you use euphemisms and wink-wink hints, nobody is offended, but let someone speak in a frank, direct way about how humans (and other lifeforms) reproduce and all of a sudden, My God! That's terrible!
Maybe it's because I work in research but I had to unlearn my learned prudishness about such words, and it wasn't easy to do, believe me. I believe that by not teaching our children the proper and correct words for parts of their bodies, we may be actually hindering them when it comes to communicating health issues, etc. Why is it that nose and mouth are acceptable words but vagina and penis are not? Is it because what is done with them? What do you say to the child who dares ask such questions?