Because by sucking the dick, then without realizing if the woman is stimulating tonsils that are in her inner oral cavity (between the oral cavity and throat) to be more sensitive to prevent foreign objects like food or bacteria and viruses into the lungs.
Whereas the tonsils can produce white blood cells and antibodies (2 important components needed by the body to prevent and fight disease, so the function of the mouth for the body's defense is actually quite important besides the hair in the nose).
Because by sucking the dick, then without realizing if the woman is stimulating tonsils that are in her inner oral cavity (between the oral cavity and throat) to be more sensitive to prevent foreign objects like food or bacteria and viruses into the lungs.
Whereas the tonsils can produce white blood cells and antibodies (2 important components needed by the body to prevent and fight disease, so the function of the mouth for the body's defense is actually quite important besides the hair in the nose).