The Kama Sutra has been effectively censored in America: it has warranted an MPAA "X" or "NC17" rating: children are not only discouraged from studying it, but in some cases not permitted to study it. For social stigma, few adults study this sutra, either.
The text contains teachings on the arrangement of furniture, social duties, and many other acts which are not controversial. However, it does contain teachings, too, on sexuality. Sexuality is a natural aspect of human existence. The scriptures of Hinduism teach that physically, human beings take upon the form of boys (immature men), girls (immature women), men, women and transsexuals. By the same nature of biology, men, women and transsexuals will associate sexually in paired marriage (monogamy) or in multiple marriage (polygamy: combinations of a single man and multiple women, or a single woman and multiple men, multiple men and multiple women, with or without the combination of transsexuals), sometimes simultaneously, sometimes not. By our nature, some humans will not sexually associate in marriage, but in profound friendship - or even in casual greeting: there is no difference between a family of monks and a family of householders. But some humans have no sexual orientation at all - even if some humans are oriented toward desiring one or both sexes. And these orientations naturally shift and evolve - not only over multiple lifetimes, but over single lives. And sexual activity is different than orientation: by our nature some people will associate sexually with one or more partners, or undertake sexual activities by themselves, or not at all: sexual activity is a form of socialization, and an means of communication. Silence is a profound communication. So is abstinence. And celibacy.
Without the teachings of Dharma, Artha and Kama, it is impossible to accurately interpret these texts.
Love, including sexual love, is an important practice of Yoga.