Kissing can actually transmit two different types of STDs [insert cringing emoji here]: herpes simplex virus (HSV) 1 and 2 infections and syphilis—but you don't have to stop swapping spit ...

However, there are more than 20 different types of STDs. [i] Of these STDs, some are more well-known than others, but all of them are serious and require medical attention.

There are certain differences between HPV and other forms of STDs. Many STDs can be cured — but will not go away — if left untreated. Usually, they require the use of antibiotic regimens.

When it comes to sexually transmitted diseases, sharing is definitely not caring. STDs affect approximately 1 in 5 Americans, with nearly half of new cases being diagnosed in patients ages 15 to 24.

The results held up across a broad range of parameters and for different types of STDs, including bacterial and HIV-like infections, Dr. Bauch said.