This has been covered quite a bit and its a good question.
Here is one of the threads
Sillage is another way people react to mones. This means the “vapor trail” our body scent leaves. You could walk around a room and leave this vapor trail. Suppose you do this in a restaurant then go sit down at a table. People wont assume its a signal coming from another person who is standing in the same vicinity as the scent. While your conscious mind is busy thinking about what your gonna have as a appetizer the subconscious mind is processing all sorts of other things that we never even think about. Like reminding you to breath or making you walk etc etc. It also processes the environment around you. It all happens so very rapidly that it never becomes a conscious thought. You just do it. Same with mones. It never really becomes a conscious thought people just read the signal and narrow done the source.