This made me cackle!!! So true.
Honestly, this is a really good explanation. All we know is that what Nynaeve thinks, never have we been confirmed that Lan thinks it.
:rofl
I just assumed that Lan told Nynaeve this at one point. I believe they talked a lot ever since they fled from Shadar Logoth. Though, I suppose, when is the question. It's been my belief that Lan wasn't that stone-faced when it's just been him and her. Or, maybe, they're just his favorite colors...