Jen Aniston and John Mayer went to their first public event together Thursday night.

They joined Courteney Cox and David Arquette — who celebrated their nine-year anniversary that night — at a humanitarian event at L.A. steakhouse STK.

A witness said that Aniston and Mayer “had their arms around each other. She was rubbing his back and whispering into his ear. They were touching each other non-stop all night.”

The bash was in honor of Jeffrey Sachs — who is known for his charity work with Angelina Jolie and is pals with Aniston’s ex Brad Pitt. (It was hosted by Mary Fanaro, founder of humanitarian organization OmniPeace, and sponsored by Kitson.)

Aniston and Mayer have been heating up ever since news broke of their relationship in April.

Mayer recently joined Aniston at one of Cox’s weekly BBQs at her Malibu home.

Of his romance with Aniston, 39, Mayer, 30, has said, “This is not a scandal, this is not an issue, this is not a problem, this needs no spin control. This is me living my life.”

She also recently brought Mayer to a Marley & Me cast party in Miami, where they held hands and kissed.

Source

PS: I totally had a sex dream about John Mayer last night.  It’s all DListed’s fault.  Did you read this article?  Ever since I read it, I can’t get it out of my head…John and I totally got a little up close and personal in my dream last night.  Let’s just say “Your Body is a Wonderland” was the soundtrack of my dream.