Social media and hookup apps like Grindr and Tinder have made casual sex more commonplace in the 21st century. While these sites encourage sexual expression and desire, they have consequently led to a nationwide spike in STD cases. The anonymous sexual escapades lead to high-risk behaviors, such as sex without a condom, multiple partners, and sex while under the influence of drugs and alcohol.

In the U.S., there are nearly 20 million new STDs that occur every year, with half among young people ages 15 to 24, according to the Centers for Disease Control and Prevention. The 25 to 30 types of infectious organisms are usually spread through sexual activity from person to person, although there are other forms of transmission, like tattooing and body piercing. These infections can be a potential threat to a person’s immediate and long-term health and well-being.

Unfortunately, some people with STDs have no symptoms and can be at risk for major health issues, such as fertility, without proper treatment. Health officials emphasize it is imperative for everyone who is sexually active to be screened for STDs at some point, based on your personal risk factors.

Click "View Slideshow" for some not-so-fun facts about STDs that every person who is sexually active or plans to be sexually active should know.