Oh Dear God!  Hulk Hogan has a sex tape.  Is this on the Mayan calendar?   I didn’t mean to watch it.  I went to a credible gossip website and low and behold, there is was.   It is my own fault.  I clicked “Play.”   I thought it was a joke.  It wasn’t.  The video is grainy, but  Hulk’s bare buttocks are exposed.  Clearly, Hulk isn’t listening to PSA’s about the danger of tanning and skin cancer.  I think what’s even worse is you can see the top of his bald head, his hair draped around it like a grass skirt.  Apparently, when Hulk is wrestling in the sheets he cannot…