2. Use Protection
This is the most obvious and effective way to avoid the transmission of STDs. As we just mentioned, many STDs are spread via the exchange of bodily fluids. You actually need to swap a lot of bodily fluids, however, meaning that a kiss isn’t likely to spread anything more serious than herpes. And even if you were to swallow a little blood after biting a lip too hard, it’s highly unlikely that would be enough to transmit HIV (though we don’t recommend testing the theory!).
The real danger then is the exchange of semen, and that’s precisely what a latex condom can protect you from, by catching it and preventing it from coming into contact with the other person. Likewise, this can prevent contact with a host of other fluids produced by the body during sex.
Keep in mind though that a condom is not a guaranteed way to protect yourself from STDs. Crabs, herpes, thrush and other issues can still spread via skin to skin contact. Unless you have yourself a whole-body condom, then you’re still at risk from these.