Here's part one of the Beeb feature, and here's part two.

I found this to be an eye-opening quote from one sex ed opponent:

The right-wing Hindu organisation Rashtriya Swayamsevak Sangh (RSS) blames "a Western mindset behind the move".

"We run about 26,000 schools across the country. Our teachers have studied the curriculum and they find it obscene and objectionable," RSS spokesman Ram Madhav told the BBC.

"The whole curriculum is designed to suit the lifestyle in Western countries, where there is a general free atmosphere. In our country we live with families."

Mr Madhav says: "Giving sex education on the pretext that India has a large number of Aids patients is illogical."

Avert.org has stats on HIV/AIDS in India.