WP:Humour is just an essay. It's not a guideline or policy.
It seems very unlikely that anyone looking for a Wikipedia essay on humour would look for it here.
Disambiguation pages should only link to main space articles. I can't find a policy or guideline about this, but it's clearly conventional. Links to guidelines and policies belong (if at all) in hatnotes. See Policy (disambiguation) for example. (But please don't add a hatnote to THIS article. It's unnecessary.)
If you really believe it belongs here, please explain how it would improve Wikipedia. Pburka (talk) 00:26, 8 May 2013 (UTC)