Is John Mayer a (shudder) serial dater?

John Mayer, single again?

Jeez, this guy goes through babes like most guys go through Kleenex.

Perhaps, judging from the photo above, he's still lusting for ... Jessica Simpson?

Click HERE for the story on his breakup with Minka Kelly.

But they're reportedly still "good friends."

Photo credit: John looks a little "distracted" while on a date with Minka Kelly to see the Knicks play the Miami Heat. Maybe he was just not that into her?
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