Karl woke up with a smile. He never knew being a man could be so pleasurable. He was so glad that he made that wish. Not that he minded being Jon's slave. He felt fortunate that he belonged to someone as loving as Jon. But that was all in the past now (his past). This was his life now. He was the master and Joan was his slave. He was free to do whatever he wanted.
Karl laid back in pure pleasure as Joan did to him what he (as Karyn) used to do to Jon. He was going to like being a man.