Where did STI/STDs come from? Since they are created via giving to someone who has already contracted it
So where did they originate from?
In: Biology
To be blunt. You always got sexual transmit microbe. In fact microbe is everywhere and you got it all the times
Only very little of them mutated and become disease. And very much little of those can spread via contact
But normal skin have more protective layer. Unlike around soft membrane and bodily orifice. So sexual is one of an act that a little bit easier to transmit disease than normal contact. It also an act that require same kind of organ to contact with each other
But once it exist and spread it then explode in number
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