The initial story in here is obviously fake, though.
While sex is all over the media in germany, and it is practically impossible to find even one person sheltered enough to not know about naughty business (let alone two of them), I could still not rule it out.... If it wasn't for the fact that sex education has been taught for over thirty years at german schools and it is mandatory by law to attend school.

Besides....
http://www.snopes.com/pregnant/nosex.asp