I entered 'Kang Kodos Forwards Backwards' to find the slogan from the Treehouse Of Horror episode where the 2 candidates in the US presidential election turn out to be the aliens. The slogan is 'It's time to move forwards, not backwards! Upwards, not forwards! And forever twirling, twirling, twirling'.
However, the 2nd result on Google has the excerpt:
Area 52: Captivity's Consequences
... From their observation point far below the surface Kang and Kodos watched the two
... Nudging his hips forwards against his lover's throbbing hardness, ...
I haven't followed the link for obvious reasons, but what manner of crossover slash can this be?