Comedienne Kathy Griffin can’t get enough of talking about her brief affair with funnyman Jack Black — which she speaks about in her new book, Official Book Club Selection.

“One time, I spent the night at Jack’s place. I got up the next morning to take a shower so I could leave. When I got out, I couldn’t find anything to dry myself with. ‘Jack, where are the towels?’ I yelled out. He said, ‘Um, I just have one that I use for a bathmat and a towel. So it’s the one on the floor.’ Totally gross. That reminds me of some of the hookups I had in college,” the Emmy-winning star of Bravo’s My Life On The D-List told The NY Post’s PageSix Tuesday.