Why do more women get infected by itching and venereal diseases than men.?

Intense itching in the external genitalia in women (鈥減ruritus vulvae鈥? may be due to candidiasis, hormonal changes, or the use of certain spermicides or vaginal suppositories, ointments, or deodorants.
The reason for the sensation of itching is not well understood. While itching is the most noticeable symptom in many skin diseases, it doesn鈥檛 necessary mean that a person who feels itchy has a disease.
Stress and emotional upset can make itching worse, no matter what the underlying cause. If emotional problems are the primary reason for the itch, the condition is known as psychogenic itching. Some people become convinced that their itch is caused by a parasite; this conviction is often linked to burning sensations in the tongue, and may be caused by a major psychiatric disorder.
Someone who itches all over should seek medical care. Because itching can be caused by such a wide variety of triggers, a complete physical exam and medical history will help diagnose the underlying problem. A variety of blood and stool tests may help determine the underlying cause.

Basically, it's anatomical. Since our female reproductive organs are inside us, we are more prone to retain bacteria if it gains access during intercourse. Obviously the vagina is a warm moist environment which encourages any bacteria to go on to grow into an infection. Since the penis is outside the body, it is harder for bacteria to gain access to inside the body before it is washed away or dries out in the air and dies.

because yours are inside and for a better analogy, like a catcher's mitt.