Here are several websites with German erotic stories that should meet
your specifications. Please note that due to laws in Germany, Austria
and Switzerland, access to erotic content that is considered
unsuitable for minors under the age of 18 is usually restricted and
subject to prior registration. When it became clear that it would be
impossible to create a list without including any sites that require
registration, I made sure to include only such site that do not insist
on using a fee-based age verification service. Because of these
limitations, the final list is, alas, rather short. Unfortunately, it
is extremely hard, even almost impossible, to find huge collections of
German erotic stories that are not protected by fee-based age-checks.
Yet I did my best to fulfill your requirements.
Also note that Google Answers does not approve of direct linking to
sites with adult content. Thus, I have deactivated the links by
omitting the http://www. part at the beginning. To make the links
functional again, just add "http://www." at the beginning of each URL.
Erotisches zur Nacht
Erotik - Sexgeschichten
[scroll down to "Erotische Geschichten" to see the categories]
[requires free registration due to Swiss laws concerning protection of minors]
seVac - erotische Geschichten im Netz
[requires free registration due to German laws concerning protection of minors]
Hope this is what you were looking for!