(Inspired by this recent question and by past experience on mi.yodeya, such as under the tznius-modesty tag.)
Do we need rules, explicit or otherwise, for what sort of adult-oriented content we'll allow here, taking into account the concept of tzniut and the fact that children can and do browse this site? On the other hand, any restriction we implement would result in certain topics of legitimate Jewish law and thought being off-limits.
For a possible precedent, take a look at this statement of policy on the Yoatzot website:
This section discusses marital intimacy. It includes an article explaining this topic from a Jewish perspective, as well as certain frequently asked questions.
Many questions received on the site are not posted publicly due to concerns of modesty. However, questions on this important topic are welcome and will be answered privately.