i think everyone is well served touching their own tailbone once in a while. for sure they should check out that bad boy during yoga class.
though this might not be the case for others, i find my own tailbone (coccyx, actually, and check out the groovy diagram on wikipedia) to be thinner and, well, bonier, somehow, than i always imagine it to be.
this is the base of your spine, the thing that holds you up so well. it’s amazing to think that the tailbone is where it all goes down.