People do have the ability to learn to smell pheromones. A good percentage of people can’t smell -none, but many of them can learn to.
Yes. I can smell them on myself when there has been no artificial application.
When I first started wearing the Androtics pheromones my wife and I both had recurrent dreams of being covered in feces or urine. see Dreams with Fecal or Urine Themes
Those dreams went away for both of us after a few exposures. I think if you give yourself a few exposures your brain may reinterpret the stimulus and the unpleasant associations may go away. They did for me.
I think this is a natural reaction. Part of us understands where we have encountered these stimuli before. Fortunately, the unpleasant effect on most others does not seem to be as strong as we might imagane.