But then there are those nasty sink-holes, earthquakes, plate shifts, tornadoes, hurricanes, not to mention termites, fires, etc.
Maybe you should look at precious metals?? But then again, there are those gun-toting criminals out there who want your goodies.
If real estate twists your nobbies, then go for it.
Most things in life carry some inherent risk. You've just got to decide what you think the risk ratio is in comparison to your tolerance for it.
Although this post was composed somewhat with my tongue in cheek, IMHO, I don't think assessing your risk tolerance is a comical matter. Asset allocation is very important and your 'pucker-factor' is rightly to be consulted BEFORE you invest in anything.