My T tells jokes sometimes and we laugh together (they are usually pretty funny--good thing we have a similar sense of humor). He told two jokes last time. One of them he had told me already, but I didn't tell him that, I just let him say it again since he tells it so well. Sometimes one of us says something and we have a little interchange that strikes us both as funny and we will burst out laughing. One time he showed me humorous photos on his computer (visual puns) that someone had e-mailed him.