Actually,
http://www.pf69-galleries.com/random-porn/ wasn't working but now it is...
This one
http://www.kftw.com.br/free-porn/ was ok -
Instead of telling users to "refresh the page" (which i'll tell you many surfers aren't as familiar with those terms as you'd think) you should have a button or link right on the page(s) telling them "not enough?" or "Link Refresher - click here!!" or whatever - you know what I mean?