Parents who discuss sex and reproduction say this is talking about the birds and the bees.

VOA: special.2009.06.28

But talking about sex isn't always easy, even for couples who plan to share everything with each other.

CNN: Why you should talk about sex before marriage

And far from only talking about sex, Benedict expanded the number of sins to include things such as pollution.

CNN: Why pope will be remembered for generations

Mr. IGOR DE VETYEMY (Architect): People are afraid of talking about sex.

NPR: Plans for Sex Museum Create an Uproar in Rio