Virtually anything can be labeled as dirty; minds, thoughts, feelings, actions, behaviours, objects and beings.
So what is this mysterious omnipresent property that we call “dirt”? Say it out loud: D(the) IRT(earth). Also, in the Latin languages, from which nearly 60% of the English language is derived from, d’/de means “from or of”. In essence, something (from/of) Earth(ly).
While dirty might occasionally have a positive meaning, mainly due to being “raw”, it is overwhelmingly considered as something bad and to be avoided.
This is part of what Chris (Darren) Deojee (YouTube channel) refers to as “the alien mind” in his works;
“I have found most Westerners have an alien mind: a visitor, firmly embedded in them. How do you know if this is you? Here are some questions that will quickly reveal the case:
A: like to visit nature (as compared to seamlessly experiencing yourself AS nature).
B: refer to ‘indigenous people’ without referring to yourself?
C: view the ‘earth’ (mud/soil etc) as being ‘dirty,’ or to be avoided, or not trodden on without ‘footwear’.
Where is one speaking/thinking from if this is the case?
These are not the behaviours of a native entity to this planet. I am NOT saying ‘an actual alien is in you’. I AM saying that your mind IS behaving like a visitor, a disembodied observer, an ‘alien’, if the above is true for you.”
More indepth here: http://www.masterdeojee.com/do-you-have-alien-mind-a-visitor-in-you/