So THAT'S Why Kate Hudson's Getting a Divorce...

... because she's a big SKANK!

She hooked up with Owen Wilson while filming "You, Me and Dupree".

“This is not a fling,” says a source close to the couple. “Kate is crazy about him. Owen gives her so much attention, and she loves it. [That’s why] she wants her marriage to be over.”

Dude Owen Wilson is a notorious player. But maybe he can help convince her that they need to cut her kid's hair.

They do look better together.