Erection Rings (AKA Cock Rings)
Why use an erection ring?
Erection rings are the most popular sex toys for men and can be used for foreplay, intercourse or masturbation. Typically they go around the base of both the penis and scrotum. Since veins are closer to the surface of the skin than arteries, the ring allows blood to flow to the penis while restricting its ability to flow outwards. As the internal pressure of the penis rises and the pleasurable feeling of firmness increases, the erection is prolonged and ejaculation is delayed. The penis also becomes less sensitive, enabling a man to better control when he experiences orgasm.
Most cock rings are made of silicone or latex rubber, though some are made of metal, leather 
and other materials. They usually feature a variety of textures on the outer rim, and should be chosen carefully according to size and design. A loose ring will do nothing, while a too-tight ring cuts off all retreating blood flow; while a constantly hard penis might sound like fun, it can become painful and even dangerous after two or more hours. Some models feature adjustable sizes and snaps, allowing emergency removal.
How is it worn?
Though some men prefer to wear a ring around the penis only, most wear it between the scrotum and the body. Putting on a solid cock ring can be tricky, and taking it off even trickier! It is easiest to be soft to do either, putting your testicles through the ring first and then your penis. Taking it off is the reverse process, but since these toys are designed to prolong erections, this can be easier said than done.
Beginners should experiment carefully with how long they wear the ring; if it becomes uncomfortable it should be removed immediately. 20 minutes or so is perfect for most men. In order to avoid unpleasant snaps or snags, you may want to trim or shave the hair in the area where you will be wearing the ring, and as with most toys, a little lubrication always helps grease the wheels.
What about rings that stimulate my partner as well?
The adult toy industry has gotten quite creative in designing these toys: they come in all different shapes and sizes. We recommend trying a variety of designs to find the best one for you and your partner. These toys are great for couples who are trying toys for the first time, as they are versatile and easy to use.
Sleeves are similar to erection rings in that they slip over the penis and sometimes the testicles; they are usually ribbed or studded to provide maximum texture along the vaginal walls.
Please note:
You should not use cock rings if you have a blood clotting disorder, diabetes, or any vascular or nerve disorder. Similarly, do not use these toys if you are taking anticoagulants, aspirin, or any other blood thinning medication. In addition, you should never wear a cock ring for more than 25 minutes or you may risk damaging the blood vessels in the penis.
come in a variety of styles and materials. The best – and most expensive – are made of smooth, soft materials like 
