SHOE ON OTHER FOOT DEPT.: Call me twisted, but what’s more fun than watching notorious ladies’ man ASHTON KUTCHER get sexually harassed?

Brunching with pals at La Poubelle in Hollywood, the “Two and a Half Men” star was spotted by a 30-ish babe, who raced to his table and gushed that she’s a HUGE fan!

“Ashton was friendly and thanked her,” said My SpyWitness.

“The girl went back to her table, downed more wine, then told her friends, ‘I have to go back. He’s so gorgeous! I just want to stroke the back of his neck!’ They tried talking her out of it, but she was up and gone – and this time, Ashton freaked when she laid creepy hands on him. He was polite, but explained he was in the middle of his meal. Incredibly, this happened TWO more times before he took action!”

On her fifth pass, MILA KUNIS Wannabe staggered up and slobbered all over the star, trying to plant a kiss!

Said the source: “Finally, Ashton snapped! Throwing up his hands, he snarled, ‘Enough is enough! You need to go back to  your table!’”

Then he summoned the manager, who tossed Wild Thang out on her ass.