Re: Hiv ??
Well your concerns are quite parnoid nothing more.
Ok, to explain.
Firstly, its very unlikley the person had HIV before you. Even if they did it would not be an issue for 2 reasons. 1, they would wash their hands and use an alcohol wash after, even if they didnt do that and they had HIV blood on their finger ( and quick frankly this just would not happen ) then you would not be at risk because HIV cannot survive outside the host or other words, once exposed to air it dies.
So you will not be at risk and more so the "what ifs" are so bizzare its not worth pondering
“Morality is only moral when it is voluntary.”
"Being defeated is only a temporary condition; giving up is what makes it permanent".