No. You cannot get HIV from someone who is not infected.
Then How did the first person ever infected get it?
Are you saying that a few people in Africa got bitten by bats and thoses few people had sex and passed it on and so on and so on till it got to people all over the world?
The question is: Is the only way to get aids, is through sharing(sex/needles) of blood/fluid from an infected person?
No you can not get HIV from someone who isn't carrying HIV.
Yes, non-infected people (gay or straight) can contract the HIV virus if they are exposed to the HIV virus from another person.
It would be unlikely to get HIV in the manner you describe.
It's possible. HIV is transmitted through bodily fluids. Mess around with bodily fluids while you have a cut on your skin would get it "inside".
A carrier is a person who carries HIV but does not get infected by it.HIV positive is a person that has HIV and gets infected by it.
Chances are low to be infected with HIV in this manner.
HIV is not in fingernails.
A person infected with HIV is generally referred to as being HIV+ (positive.) Often times, it is shortened to just "positive."
No. HIV is not transmitted via casual contact.
No
If the person it infected with HIV, it is possible to transmit HIV in that fashion.
If injected with the virus HIV, they would be infected.
Yes. To get HIV it takes body fluids.