John Mayer has learned a valuable lesson: To keep his mouth shut when it comes to questions about his (many) famous exes!

On Tuesday, the singer sat down with Ellen DeGeneres to talk about his latest album, but of course Katy Perry came up in conversation.

Mayer didn't keep completely mum on the subject of their split -- see what he said about the state of their high-profile relationship above!

At least he's learning to take the high road when it comes to his past relationships.

Taylor Swift reportedly wrote "Dear John" about the musician after they split ... and he famously spoke out about exes Jennifer Aniston and Jessica Simpson, who he called "sexual napalm." 

Do you think John and Katy will get back together again? Sound off below!

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