Never mind saving the planet — they just wanted to rock on the boat.

Lefty activists reportedly got frisky on the so-called freedom flotilla meant to bring aid to Gaza — becoming the subject of a recent sex scandal.

And even the Swedish queen of sanctimony herself is rumored to have chosen to “seas” the day aboard the vessel.

Kebbon and Thunberg cozied up on a couch this week while the latest flotilla set sail for Gaza. iara modarelli/ Instagram

Activist Greta Thunberg may have gotten hooked on a hunky photographer during one of the flotilla’s voyages.

Since returning from her second voyage to Gaza in October after a short stint in an Israeli prison she whined was bedbug-infested , Thunberg and Swedish shutterbug Chris Kebbon have been inseparable.

Just this week, they were pictured cozying up together on a couch, with Kebbon holding a dog draped with a keffiyeh around his neck and Thunberg flashing a blissful smile as she rested her head on his lanky arms.

Kebbon, 23, a long-haired Stockholm-based…