Been reading all kinds of posts today and going to bed with not a good feeling.

Nepcha's analysis is passable but alternate - i have a quick question for ya = I HATE (capital to emphasize) caste system and  that too of Nepal. From what I know kaami, damai were/are untouchables to master class of Nepal but never heard Tamangs were not allowed to enter your house? I assume you belong to so called superior caste. If I was you, I would not use lower castes etc. This is 21st century - get rid of that feeling.