"Dear Ex Lover," Mayer wrote on his Web site. "Perhaps you didn't understand the last time I told you to stop contacting me, so I'll do my best to spell it out for you. I do not wish to have you in my life anymore. I don't know how much more clear I can be about it. It would serve you best to move on with your life and find someone who can put up with you, because I'm done trying. I hope this is enough closure for you."
Even the most cadlike behavior works with Mayer's agenda, according to Titus.
"He plays to the media. He even dates for the media. Every action is preplanned for some kind of media effect," said Titus, who categorizes Mayer alongside celebrity players like Paris Hilton and Ryan Phillippe.
"He sort of wants to be seen as carefree, but I think every move -- especially when it comes to romance and dating -- is preplanned to get some kind of response from the public and the media," he said.
That includes Mayer's recent palling with celebrity blogger Perez Hilton, which Titus refers to as a strategic alliance.
"John Mayer's not a stupid guy," he said. "The friendship with Perez is very premeditated. At the moment, whatever comes out of Perez's mouth is the trend. So he's courting Perez in that sense because Perez can spin it anyway he wants. For John, it was a genius move."
But celebrity publicist Howard Bragman, owner of Hollywood PR firm Fifteen Minutes, pointed out that "celebrities can fall in love, too."
"Because of the life he leads, John's skeptical of going out to the club or the bookstore, or wherever people meet," Bragman said. "So he goes to celebrity events and meets other celebrities.
"And why wouldn't celebrities get crushes on other celebrities?" he continued. "You and I do. They're beautiful, they're articulate. It's like a workplace romance: They meet at charity events or on movie sets. They're in the same club, so to speak. Jennifer Aniston is just as famous as him, so she's not dating him because he's famous."
Bragman also points out that not every dalliance that lands in the press is the real thing.
"I had a client whom the press said was dating John Mayer," Bragman said. "It's one text message, and the media blow it up to 'they're engaged.' The media has to take a certain amount of responsibility. They start with a germ of truth and build it into something more. Two celebrities glance at each other in a public place and it's on Page Six."