Anal male and female
The human anus from Latin anus meaning "ring", "circle"   is the external opening of the rectum. Two sphincters control the exit of feces from the body during an act of defecation , which is the primary function of the anus. These are the internal anal sphincter and the external anal sphincter , which are circular muscles that normally maintain constriction of the orifice and which relaxes as required by normal physiological functioning. The inner sphincter is involuntary and the outer is voluntary. It is located behind the perineum which is located behind the vagina or scrotum. With anal sex , the anus can play a role in sexuality.
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What Does Anal Sex Feel Like For Men? 12 Men Share What It's Really Like To Be Giving Or Receiving
Female condoms for anal sex | aidsmap
Another study conducted by the University of Indiana asked questions on heterosexual anal sex and found that the percentage having anal intercourse within the past year demonstrated a similar age breakdown as that of the NSFG. Adolescents are also practicing heterosexual anal sex; and again, the prevalence increases with age. Are there health concerns regarding heterosexual anal intercourse? Of course — as with all types of sexual activity — there are both emotional and physical pitfalls. People need to be educated about the dangers of anal intercourse, so they can make an informed decision about whether or not to participate in the activity. Heterosexual anal intercourse predominantly impacts the health of young females as compared to young males.
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Condomless anal intercourse among males and females at high risk for heterosexual HIV infection
Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person's anus , or anus and rectum , for sexual pleasure. While anal sex is commonly associated with male homosexuality , research shows that not all gay males engage in anal sex and that it is not uncommon in heterosexual relationships. Anal sex is considered a high-risk sexual practice because of the vulnerability of the anus and rectum. The anal and rectal tissues are delicate and do not provide lubrication like the vagina does , so they can easily tear and permit disease transmission, especially if a personal lubricant is not used. Strong views are often expressed about anal sex.
Understanding and addressing heterosexual HIV transmission requires attention to the range and context of heterosexual sexual behaviors. We sought to determine population-based prevalence of condomless anal intercourse CAI among individuals at increased heterosexual HIV risk in Baltimore and to identify demographic, behavioral, and health related correlates. Bivariate and multivariate logistic regression examined factors associated with heterosexual CAI.
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