I don't know anything about these things, and my ignorance scares me. I want to know everything. I want to know every type of STD, its symptoms, characteristics, & effects. I also want to know about HIV & AIDS. I often see them affiliated with each other; are they the same thing? I want to know the symptoms, characteristics & effects of HIV & AIDS as well. How can all these things be transmitted? What regions of the body are susceptible to these diseases?