Anal sex is when one person places an erect penis, finger, or object into the anus of another person to give and receive sexual pleasure. Many people enjoy anal stimulation. Some people, though, don't like anal sex and that's normal, too.

Unlike the vagina, the anus is a tighter opening that doesn't have its own lubrication. The anus also has a very strong muscle that is designed to keep things out of the rectum. That's why most people have to "prepare" the anus for intercourse by gently inserting a gloved and lubricated finger into it to train this muscle to relax. It's also a must to use lubrication (K-Y Jelly, Astroglide) on anything going into the anus to avoid tearing or irritating the lining of the anus.

When inserting something into the anus, go slowly and stop if there's pain or resistance. It's best if a person empties the bowels (goes to the bathroom) before anal intercourse and washes well before and after anal sex or oral-anal contact.

Bacteria in fecal matter can spread to other body areas if someone touches your anus and then other parts of your body. For example, in heterosexual sex, be very careful not touch a girl's anus, then her vagina, since this can lead to an infection. It is important to use a condom, latex glove, or dental dam, and wash very thoroughly.

Like other forms of sex, it is possible to transmit sexually transmitted diseases (STDs) between partners during anal sex by sharing fluids. This means ejaculating into or onto the anus, having oral-anal contact, or inserting something into the anus, then inserting the same object into a partner's anus, vagina, or mouth.

There are lots of ways to reduce the risk of getting or giving a sexually transmited disease from anal sex. For example, you can use a male condom on the penis, toys, or your finger. You can also use a female condom inside the anus. You can put a latex or non-latex glove on your hand. For oral-anal contact, you can use a Sheer Glyde Dam over the anal area.

If you would like more information about safer-sex products and how to buy them, check out these Web sites:

• Trojan Condoms
• Sheer Glyde Dams