Its is common knowledge in South India as to who the Sengunthar/ Kaikolar are and its not my problem if you've been living in a very close knit community or unaware of this.

1. The following is quoted from a legitimate third party website. http://globalindiamissions.org/newsletter/nwsltr0802.htm

The Kaikolan are a large Tamil and Telugu caste of weavers. There are seventy-two subdivisions (nadu or desams). Their name comes from a mythical hero and from the words "kai" (hand) and "koi" (shuttle). They consider the different parts of the loom to represent various gods and sages. They are also known as Sengundar, which means a red dagger, which is traced to the legend of the earth being harassed by demons, which led to the people asking the god Shiva to help them.

Traditionally, one girl in every family was set apart to be dedicated to temple service and becomes a "Devdasi" (meaning female servant of god). In the temple, the girl is considered married to the temple deity but in practice becomes a prostitute, especially to the Brahmans and she learns traditional music and dancing.

2. This is taken from a journal research article with abundant valid references. This is as legitimate as it gets.

This article talks in much detail about how women from the Sengundhar/ Kaikola caste get into the sacred prostitution in temples.

"Contending identities: Sacred prostitution and reform in colonial South India Priyadarshini Vijaisri A1, A1 Centre for the Study of Developing Societies (CSDS), New Delhi" South Asia: Journal of South Asian Studies Publisher: Routledge, part of the Taylor & Francis Group Issue: Volume 28, Number 3 / December 2005 Pages: 387 - 411

To view the complete article just register, its free.

Here are the links 

http://journalsonline.tandf.co.uk/link.asp?id=jv31l27518262711 If you cannot access it then just go to the following page and follow one of the links

http://www.google.com/search?hl=en&q;=Contending+identities%3A+Sacred+prostitution+and+reform+in+colonial+South+India

3. This is taken from another legitimate webiste http://www.go2southasia.org/l_peoples.html of a world renknown organisation recognised by many countries. They have no gain in just picking on the Sengunthar caste.

The KAIKOLAR people are a caste of weavers 1.5 million strong in southern India. They are Hindus and view different parts of the loom as representations of various gods and sages. Traditionally, each Kaikolar family sets aside one daughter to serve in a Hindu temple. That daughter is considered married to the temple deity—often the Hindu destroyer god Shiva. In practice, the daughter becomes a temple prostitute.

All 3 of the above references are quite legitimate and I can quote many more. There is no question of coincidence or any error in any of these sources.