A billboard advertisement featuring a well-built male model wearing nothing but a pair of skimpy underpants has feminists in New Delhi hot under the collar. Furious protesters are considering launching a campaign against the billboard ads - for Rivolta underwear - which they condemn as unhealthy. They claim the hoardings, which are captioned 'undress code for men', convey the wrong message - that men should take pride in undressing for women. 'The underwear in the advert is so tight fitting that it instantly attracts attention,' said a spokesman for Action India, a Delhi-based women's welfare organisation. 'It's obscene.' The hoarding is the most explicit to appear on the streets of the capital. Another women's rights campaigner, Jaya Srivastva, said: 'It will exercise an unhealthy influence on youngsters.' But the bold briefs advert is not the first to have caused ripples. Last year two of India's top models, the former Miss India, Madhu Sapre, and her live-in lover, Milind Soman, posing nude in a magazine advert for sports shoes outraged moral values of the Hindu fundamentalist coalition government in the western state of Maharashtra.