Matthew Perry can’t even announce he is going to rehab without making a joke. The Friends and Mr. Sunshine actor said Thursday he is going to rehab as a pre-emptive measure in his continuing recovery. “I’m making plans to go away for a month to focus on my sobriety and to continue my life in recovery,” Perry said. “Please enjoy making fun of me on the World Wide Web.” Perry has been in rehab twice before, for prescription drug abuse in 1997 and in 2001. Despite a trip to rehab, a source insisted, “There was no relapse,” and said the stay is purely proactive.