To discover the most sensitive "F" and "R" areas on a man's reproductive organs, it is best for the couple to lie naked side by side on the bed, touch the underside of the penis with your hands, and follow the coronal edge (the crown of the penis head) edge), a small area of ​​skin connected to the foreskin down the shaft of the penis.

If the foreskin has not been removed, you must gently pull up the foreskin to find it. This small piece of skin is called the "frenulum" or the F zone. It is one of the most sensitive erogenous areas in men. During sex, , the F zone is strongly stimulated deep in the moist and warm vagina, resulting in contraction of the man's pelvic muscles.

However, the position where the wife is strongly stimulated often causes long-lasting problems for many men, because when a man's F area is stimulated, he will have a feeling of losing control. At the same time, the wife's C area (referring to the clitoris area) , that is, the stimulation received by the Clitoral area is usually much weaker than the stimulation received by a man's F zone, so it is difficult for orgasm contraction to occur, and even if it does, it will be much slower than that of a man.

The R area refers to a raised "slit" (Raphe) in the middle of the scrotum that divides the scrotum into two parts. The skin of the scrotum is very special and is as sensitive as the labia majora of the woman's vaginal opening. The wife uses her fingertips to move along the surface of the scrotum. Rubbing this middle seam back and forth can bring great pleasure to the husband.

Another kind of stimulation that the wife can do is to use the tip of her middle finger to start from the bottom of the scrotum, along the scrotal seam, and stroke it all the way to the penis. Such stimulation can help men integrate the scrotum and penis into a response unit. Replace the penile neck-based reaction developed in the past.