pI'm a 90 year old retired academic physician. Ages; puberty 12, married 22. Sex with wife weekly over the years. From premature ejaculation at marriage to soft erection and rare ejaculation by age 76. Used 50 mg Viagra with fairly good results to age 85, when I first needed Osbon Erecaid kit. Tried rubber constrictor rings A through D, ending with D which gave best erection but was difficult to remove from penis. At age 87, to facilitate removal, tried adjustable loops as well as EZ Ring (Insert penis through a cylinder cap before suction), and was not satisfied with either. On two occasions at age 90 constrictor caught around one testical, causing discomfort. After sex I had to cut the ring to remove it. Then I purchased a body shield (5" D, flexible, transparent plastic, with 1" D hole for base of penis). At same time I switched to ring B. Shield needs to be well lubricated for suction to work, and erection is not quite as great as with ring D, but so far I have had no repeat of the trapped testical, and have had a satisfactory sexual experience. It is easy to remove the shield after applying the suction, and it's much easier to remove ring B after sex.