Dave from Scranton wrote:
Dear Dave:
      Bees are finicky when it comes to odors.  They react to them
vigorously, some races more than others (best example, africanized honey
bees).
      It could very well be that they are reacting to the pheromones of
your other hive. Or, perhaps to odors on your clothing, body, equipment
etc.
       I for one never use any type of lotion (after shaving, deodorant,
hair, etc.) and I always blow smoke on my bee suit when freshly washed
(because modern washing materials are scented).  I have the habit of
walking through my bee sites in street
clothing and without smoke and I don't get stung.  I have observed my
bees go after visitors on the spot while not bothering me at all.  Why?
It could be due to cosmetic scents or just simply to the person's
secretion of adrenaline.  Either one is capable of
arousing honey bees.
     I hope that I have been helpful to you.
Best regards.
Dr. Rodriguez