I like it. Back on Ask (when it was still a Q&A site) we had plenty of those -- a lot of them centredaround "could I be pregnant?" But they didn't stop at that.
It's not a category. We tag our questions ourselves. You might say I created my own subcategory under the Humor/joke section. They might not all fit into that category, but anyway... my way telling not to take the questions too serious and let the imagination fly free when replying on them. A lot do, others tend to take them a tad too literally. Hmm.