This is a fun site, but there are some lines of distinction that become confusing.
Like the difference between a riddle and a situation riddle. I lost a few points over that, having no way to really know it was not allowed.
However, what is the difference between a riddle and a joke? Often times they have things in common - they both seek out a solution, often the solution depends on some twisting of words. I doubt we want this site to become a joke site, but it would be good to find the line.