Welcome to our Forum.  Your questions suggest that despite your reading on thebody.com (and I presume other sites) you do not have a good understanding of how HIV is spread from person to person and that you are far more worried than is appropriate.  What was said at thebody.com was correct- HIV is difficult to transmit and is almost never transmitted by touching.  HIV is a fragile virus which begins to die on contact to the environment and is transmitted between adults almost exclusively through DIRECT sexual contact and INJECTION of infected materials DEEP into tissue.  It is NOT transmitted through touching of any sort.  Transfer of infected material from person to person by transfer of infected material from one person to another on someone's hands is not a way that HIV is transmitted.  HIV is not acquired by swallowing things that have been touched by a person with HIV, even if that person has blood or secretions on their hands and is not transmitted by rubbing the eyes.  None of the situations you describe above have ANY meaningful risk for HIV.   HIV does not infect people trough indirect contact with the mouth, swallowing or through the eyes.

I hope this is clear.  You have no need to worry about any of the situations you describe.  EWH

Transmission of HIV required delivering blood or infected material to susceptible tissue.  For transmitting infection to the blood stream (and therefore getting to susceptible tissue) a  simple puncture wound from a sharp object is not as risky as a puncture with a hollow object sure as a needle. Hollow needles can contain residual blood and therefore transfer blood. 

This is my third and final reply to your questions.  If you have more questions you will need to start a new thread and this thread will be closed in a few answers.  My sense however is worrying more about HIV than you need to be.  EWH