What was that secret that Roz whispered to a shocked Marty?

I cant remember exactly what was said. I didnt actually ask them.

Marty was quite old-fashioned in some ways, so it might not have been anything too shocking by today's standards.

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Roz to Marty:

...Hey we just lost 4 points. We went from #3 to #30 in just two seasons. And we weren't nominated for an Emmy!

I always imagined she said something like "we're going to play a joke on these guys. So when I finish talking, just look horrified and walk out."

I like to pretend that she told him that she partakes in threesome's, but not your run of the mill variety. No. Sweet Roz told him that she prefers to allow the larger endowed man defecate on her chest, after which point she hugs the smaller man with the sewer tour still in place, as the other man rails her from the back and they begin to double penetrated with a sort of "slip n slide" action to help maintain the motion.