CHAPTER ONE
INTRODUCTION
1.1       Background to the Study
Sexual intercourse or coitus or copulation, is closely the insertion and thrusting of male’s penis, usually when erect into a female’s vagina for the purpose of sexual pleasure or reproduction; also known as vaginal intercourse or vaginal sex (Cecie, Ada, Irving & Kar, 2010). Other forms of penetrative sexual intercourse include penetration of the anus by the penis (anal sex), penetration of the mouth by the penis or oral penetration of the vulva or vagina (oral sex), sexual penetration by the fingers (fingering), and penetration by use of a strap-on dildo (Rutter & Steinberg, 2004). These activities involve physical intimacy between two or more individuals and are usually used among humans solely for physical or emotional pleasure and commonly contribute to human bonding (Richard & Fedwa, 2007). A variety of views concern what constitutes sexual intercourse or other sexual activity (Douglas & Nancy, 2008) which can also impact views on sexual health (O’leary, 2002).
            The term sex, often shorthand for sexual intercourse, can mean any form of sexual activity (Randall & Byers, 2003). Because people can be at risk of contracting sexually transmitted infections during these activities (Daouglas, Ann, Fedwa & Randall, 2007) though the transmission risk is significantly reduced during non-penetrative sex (Keath, Wayne & Nilamadhab, 2005), safe sex practice is advised (Dianne, 2008) various jurisdictions have placed restrictive laws against certain sexual acts, such as incest, sexual activity with minors, extra marital sex, prostitution, sodomy, rape and zoophilia. Religious beliefs also play a role in personal decision about sexual intercourse or other sexual activity such as decisions about virginity (Daouglas, Ann, Fedwa & Randall, 2007) as well as legal and public policy matters.
            Religious views on sexuality vary significantly between different religions and sects of the same religion, though there are common themes, such as prohibition of adultery. Reproductive sexual intercourse between non-human animal is more often termed copulation, and sperm may be introduced into the female’s reproductive tract in non-vaginal ways among the animals, such as by cloacal copulation. For most non-human mammals, mating and copulation occur at the point of estrus (the most fertile period of time in the female’s reproductive cycle), which increases the chances of successful impregnation (Lloyd, Rutter & Ann, 2007; Jared, 2005). However, bonobos, dolphins and chimpanzees are known to engage in sexual intercourse regardless of whether or not the female is in estrus, and to engage in sex act with some sex partners (Hales, Ann, & Weiner, 2010) like human engaging in sexual activity primarily for pleasure (Carpenter, 2005), this behaviour in the aforementioned animals is also presumed to be for pleasure (Fawcett, 2008), and contributing factor to strengthening their social bonds (Laura, 2005).            
The sexual rate activity rate among young teens is increasing. Among males who turned 20 between 1970 and 1972, 20 percent had sexual intercourse by age 15, compared to 27 percent of those who turned 20 between 1985 and 1987. Of females who turned 20 between 1985 and 1987, 10 percent had initiated sexual intercourse by age 15. Compared to 14 percent of those who turned 20 between 1970 and 1972 (Marisglio & Mott, 1998). African Americans are more likely to initiate sexual intercourse at a young age. More than half of African American males have already had sexual intercourse by age 15. White and Hispanic males do not attain these levels of sexual activity until age 17. In 1992, approximately 25 percent African American females and approximately 15 percent Hispanic and white females have had sexual intercourse by age 15 (Marsiglio & Mott, 1998). Pregnancy rate among females age 14 and under rose from 13.5 (per 1,000 females age 14) in 1973 to 17.1 in 1992. Approximately nine percent of sexually experienced females age 14 and under become pregnant each year (Moore, Miller & Glei, 1995). The abortion rate among all females age 14 and under was 5.6 (per 1,000 female age 14) in 1973, 8.4 in 1980 and 7.9 in 1990. In 1994, there were 12,901 births to teens under the age of 15 (Nord, Moore & Morrison, 1992). Moreso, adolescent females may be more susceptible to STDs than older women. Teen girls have fewer antibiotics to STDs and may have a higher risk of cervical infections (Moore, Miller & Glei, 1995). The maternal death rate for teen under age 15 is two and a half times greater than that of mothers aged 20 to 24 (Moore, Myers & Morrison, 1993). Babies born to teens younger’s than 15 are more than twice as likely to weigh less than 2,500 grams (about 5.5 pounds) at birth and are three times more likely to die in the first 28 days of life than babies born to older mothers (Langan & Harlow, 1994). The risk between early child bearing and poor health outcomes is due to the numerous risk factors associated with being young, such as inadequate prenatal care and nutrition (Boyer & Fine, 1992). The younger a woman is, the less likely she is to receive prenatal care during the first trimester of her pregnancy (Moore, Miller, & Glei, 1995). Of African American teen mothers who were less than 16 years old when they gave birth, 72 percent were still living in poverty at age 27. Among Hispanic women and White women, 67 percent and 32 percent, respectively, are living in poverty (Boyer & Fine, 1992).