No pheromones dont make you feel drunk or lose your memory. They dont make you do anything you dont really want to do.
So suppose your “friend” is not into you in a sexual way. Tuth is not going to make her sleep with you. There has to be sexual attraction to begin with. Tuth just influences them to express it more.
The IH generally gives them a feeling of trust and closeness. Once the actual pheromone wears off they still retain that impression of you unless you give them reason to feel otherwise but they dont feel like surprised or tricked. They usually feel like your easy to talk to and connected.
No you dont have to wear mones forever. As I mentioned if there is no initial attraction to begin with mones wont cause someone to go out with you just from there presence. Pheromones are just one part of attraction. Pheromones just open the door, you still have to walk through that door.
Here read this to help you understand them more
Tisha