Are you noticing that fleas have a tendency to bite you while leaving your wife, husband, or other members of your family alone?
It is true that fleas do have a preference of biting certain people more than others, but the exact scientific reason is not known at this time.
The most likely reason is differences in diet and differences in chemicals on the skin that either attract or are repellent to fleas.
If fleas seem to have a preference for you, I recommend that you change the type of soap, skin lotions, shampoos, and perfume that you are using and see if it makes any difference.
You will have to experiment a little bit see if there is a certain product that you are applying topically to your skin or hair that is attracting fleas.
In addition, think about your diet and if there is anything that you are eating that the other people you are around are not eating, which could lead to chemical differences on your skin that the fleas can detect.