You didn't specify which type of grass you saw so I took the liberty:"with grass clippings all over their bodies"
the only diesel campaign was with the scary clown by KesselsKramer....
haha, it was a fashion brand i think, maybe diesel or something
well, that's a new fetish to me.. whatever floats your boat mate.
I remember seeing a photo shoot somewhere where nude/semi nude models were frolicking on grass with grass clippings all over their bodies,sort of like this: