Ben Affleck Rumored New GF Thongs Out at the Beach

8/22/2018 5:30 PM PDT

Ben Affleck's Rumored New GF Shauna Sexton Thongs Out in Malibu

EXCLUSIVE

Shauna Sexton -- the Playboy model who's been grabbing food with Ben Affleck lately -- is lookin' like a snack herself ... in a sexy swimsuit.

Playboy's Miss May 2018 hit the sand in Malibu Wednesday -- without Ben -- rocking a head-turning thong bikini as she caught some rays and took in a dip in the ocean.

Pretty easy to see how Shauna might have caught Batman's eye.

As we reported ... Ben and the 22-year-old model were seen leaving Nobu Malibu last Thursday after a dinner date, and the 2 were also spotted going through a Jack in the Box drive-thru Sunday.

The sightings signaled Ben had broken up with Lindsay Shookus, who we saw being lovey dovey with him back in May when he was moving into his $19 million Pacific Palisades mansion.

The 2 hadn't been photographed together in a month, though ... and now we know why.