And I bet parliament is full of invisible pink unicorns.

We can speculate all we want, but making up claims that are totally unsupported, and presenting them as actual statements made by a specific person in this way is pure character assassination.

I always wondered, if the unicorns are invisible, in what sense are they pink?

I think that's part of the point of their proverbial existence. Their description isn't self-consistent, which is just further emphasizing these are objects that don't exist.

But then they don't match the thing being compared with, which at least MAY exist.