Rates of sexually transmitted diseases increase among those over 55, according to the CDC. 40% of people between 65 and 80 years old are sexually active and almost two-thirds are interested in sex.

However, experts point out that many older adults know little about STDs. Although older people may have a harder time clearing infections, medical experts noted that doctors need to do a better job of discussing safe sex with older patients. Among postmenopausal women, the vaginal lining is more prone to tearing, making it easier for an infection to develop.