Normal wear leads to OA, which is one of the most common forms of arthritis. Infection or injury to the joints can exacerbate this natural breakdown of cartilage tissue. If you have a family history of the disease, your risk of developing OA may be even higher. "Discontinuation of sexual intercourse" is Latin because of "disrupted sexual intercourse." What happens is that the man pulls the penis out of the vagina before ejaculation. In general, this means that he "shoots" onto a woman's thigh or abdomen. Although this is an unreliable method, itc is certainly better than not using anything.