Polygyny or the practice of having more than one wife is legal in India only for Muslims, but National Family Health Survey (NFHS) data shows it is almost as prevalent in other communities, though on the decline in all.
Most of us acquire knowledge regarding sex and sexuality, through various formal and informal avenues. Much of the information acquired through infornal sources is unlikely to be accurate or correct. Sex being a topic, which is not openly discussed is shrouded in secrecy.