3 Positive reinforcement is most effective when it occurs immediately after the behavior. Reinforcement should be presented enthusiastically and should occur frequently. Deliver reinforcement quickly: A shorter time between a behavior and positive reinforcement makes a stronger connection between the two
If you mean humans have 5 senses (taste touch hear smell see) YES
True. Having HIV connotes gay sex or sex with prostitutes. Both of these types of sex are stigmatized heavily. STDs in general stigmatized, but HIV is especially taboo.