Cats like dairy?

Sometime back in 2013, I began a conversation about pink camouflage. I was telling H that I hated it but since technically deer can't see pink, it passes radar. That began this conversation:

H: "Who says deer can’t see pink?"
Me: “Scientists.”
H: “Scientists can be wrong.”
Me: "Oh?"
H: "Yeah, they can be. Scientists said cats can't taste sugar, yet they like ice cream."

At this point, I paused to look at her, judging her sincerity. Sure enough, she was serious.

Me: “I'm sure cats eating ice cream has everything to do with the sugar and nothing at all to do with with the dairy."
H: "Cats like dairy?”

Pause for about 3 seconds, then

H: “Oh yeah!"

An epiphany was had.