The document discusses safe sex practices and provides information about sexually transmitted infections (STIs). It defines what an STI is and explains that STIs can be caused by germs passed through sexual contact. The document emphasizes that condoms are the only way to protect against STIs and should be used every time one has sex. It lists potential signs and symptoms of STIs and notes that some may not cause any obvious signs. The document advises anyone who thinks they may have an STI to see a doctor as soon as possible. It proceeds to describe several common STIs such as chlamydia, gonorrhea, genital herpes, human papillomavirus, syphilis, hepatitis B, and HIV/