| wfz said: Why do sexually transmitted diseases even exist in the first place? I'm sure i learned about this years ago, but I forget... |
Because viruses could use every body contact to spread. They don't care if it is sperm or a a handshake, but many viruses prefer a wet enviroment.
Since humans live near to animals (since humans domesticate animals) some mutated animal viruses could transfer to humans, some even don't need contact for this, it is enough to breath the same air. This is very rare but the possibility grows if many humans live near to animals in their house (like the bird flu in China).
In general this is not a problem, newer scientific researches even suggest the possibility that some viruses are really useful and essential for humans. But if a virus mutates it could get dangerous for its host.
By the way: Are there really people out there who need another reason for safe sex? Every man or woman with half brain would use condoms anyway.
