The virus is not the type that uses an insect as part of its life cycle. No one has contracted AIDS through sharing a glass with an infected person. The chemicals used in hot tubs and other common bathing facilities would instantly kill the AIDS virus. The virus is very fragile once outside the body, and it dies quickly. The virus is rarely found in saliva, and when it is found, the concentration is too small to be infectious.
Tears are similar to saliva.
No one has contracted HIV from someone crying on them. By knowing the make-up of certain parts of the body, it is easier to understand how transmission may or may not occur in these areas. Friction during vaginal intercourse, and scarred lesions from having had a venereal disease at some time, may cause bleeding to occur. If semen with HIV were present in this area, it could get into a woman's bloodstream this way. The rectum is a hollow tube whose walls have a rich blood supply.