The fact is, married people have more sex than unmarried. Married women need birth control to plan pregnancies, which is a matter of health care. The idea that some people seem to have is that birth control products are mainly to be used by promiscuous women! Wrong!

Article from WebMD health news:
Gender Inequality, Not Promiscuity, Main Factor in Sexual Health

"So why is sexual health such a huge problem? The study suggests that unequal treatment of girls and women as the major sexual-health issue."
"Monogamy is the dominant pattern in most parts of the world. Men report more multiple partnerships than do women. Such men are more likely to live in developed nations."
"Marriage is no safeguard of sexual health. It is more difficult for married women to negotiate safe sex and condom use than it is for single women."