Because of the way that sexuality works in all of us, the more responsible we are, and the more safe and protected we feel, the easier it is to be really aroused and to enjoy sex: which is the point, right?

As many as one in ten Americans have HPV, and some studies show that at least one-third of all sexually active young adults have genital HPV infections. It is often stated that more than half of all college-age women wil become infected with HPV during their college career.

Is it possible to have more than one STI at a time? When you and your partner both have HIV you don't need to use a condom right? How can you tell someone had an STI? Scarleteen’s taking the time to debunk some of the most common misconceptions surrounding Sexually Transmitted Infections in one handy place.

Trichomoniasis is one of the most common sexually transmitted diseases, mainly affecting 16-to-35-year old females.

This disease has bothered humans for thousands of years, but it seems to come and go in unexplainable cycles. Scabies used to be very rare in America, but now it is coming back again.

HIV is a virus that destroys the immune system and thus weakens the body's ability to fight disease and infection, even common infections like flus and colds. HIV usually progresses to AIDS. This makes HIV the most dangerous sexually transmitted infection today. It is the fifth leading cause of death for the young under 40 in the United States. At this time, no one has been cured of HIV or AIDS.

Hepatitis is is an inflammation of the liver almost always caused by different hepatitis viruses. Hepatitis B is the type most often sexually transmitted. Worldwide, more than 350 million people have Hepatitis B.

Every year, CMV causes permanent disabilities, hearing loss and mental retardation for as many as 7,000 infants.

Bacterial vaginosis (BV) is the most common cause of vaginitis symptoms among women of childbearing age (15-45). However, half the women who meet clinical criteria for BV have no symptoms.

Vaginal discharge and secretions are a normal, healthy part of your reproductive system. The vagina -- which is not the whole of your genitals, that's called the vulva, but the flexible tube behind the vaginal opening and inside the body -- is a passageway between the outside of the body and the internal reproductive system. The pH balance of the vagina is acidic, with "good" bacteria, by design, which helps keep infections away. Vaginal secretions are how the vagina cleanses and regulates itself -- how amazing is that? -- in the same sort of way that saliva helps keep your mouth clean and healthy.

There are instances in which condom use alone - or the use of dental dams and gloves -- cannot offer the level of STI protection they can in other instances, with STIs which are transmitted not via fluid exchange, but by skin-to-skin contact: namely two of the most common STIs, HPV and Herpes.