I began using the Vacurect 2 weeks ago. The first thing to know is it works different than the others you may read about, in that the ring, which really looks like a washer with a hole in the end goes onto the pump tube AND your penis head goes into or at lest against the ring opening before pumping. The instructions tell you to use lots of non-petroluem lube on the base of the pubic area, where the hair is, (if you are just exercising blood flow and not putting on the ring), otherwise on the pump side of the base of the washer ring itself, and on the ring opening that the penis goes into. The instructions says to start with the largest size first and progress smaller until you find one size that will keep the blood in the penis and not allow it to leak back out, resulting in loss of erection. You lube up the pump, ring and your penis, then place the washer onto the end of the the pump, with the raised inner edge of the ring facing into the pump, hence outward facing on your penis. Place the penis head onto the washer ring opening , press gently against the head and pump a little bit. This will draw the head and some length of the penis through the opening in the washer ring and into the pump. At this point, I found it more comfortable to remove the pump from the ring base and manually pull on the skin of the penis working it through the ring so that things aren't stretched too far, resulting in possible tearing. Push the ring down on the penis toward the body as far as possible by hand. Place the pump back on the ring, it's easy to do, then slowly pump. Do a couple short pumps and wait. You should see some growth of the penis inside the pump sleeve, If you try a few times pumping and it doesn't grow, then check that you have plenty of lube on the inner base of the washer ring, and press the pump tighter into the pubic area, sealing out any air leaks the pump may be pulling. Take your time, and slowly pump, once it starts enlarging. I found that there's a slight uncomfortable 'twinge' in the penis head when reaching close to full pumping. If the ring is still working to keep the blood from leaking back out of the penis, stop pumping when you feel that first twinge and allow the penis to finish filling with blood by using the residual vacuum in the pump. When you are satisfied with the results, take your finger and press down on the outer lip of the ring, into the pubic area, making it lose its vacuum seal. Remove the pump and you should have a firm erection. It may not look or feel like you had before, it may be uncomfortably stretched and tight skinned, practice will teach you when enough is enough to allow a useful erection that isn't uncomfortable. The washer ring should be sized small enough to hold the blood in, not allowing the penis to go back down. You have 30 minutes of use in any form you want, make sure not to exceed that time, to avoid damage to the erectile tissue. When you want to remove the ring, add more lube to the penis length, from the washer ring to the head, then slowly and gently squeeze the blood filled penis with a full grip of the hand. This pushes the blood out past the ring restriction. Squeeze slowly and gently. If you have had to use a one of the smaller rings to keep the blood in, the squeezing may not work much, so do it a little, then grasp the ring edge with both hands and pull outward, stretching the ring. With lubed fingers, I can usually get a finger tip between the ring and the penis, which allows for draining. This allows the blood to flow out of the penis quickly. When the penis is small enough, slowly pull the ring off the lubed penis.
To just exercise the penis, I have found that I can use a good soap lather on the pubic area, without the rings and pump up the penis and the soap will seal it to the body without any rings. I let it stay there for a half minute or so, then release and do it again for a few repetitions. Pick a time when you aren't rushed or distracted, take your time, and practice it until you have figured and fitted your pump and ring to yourself. It'll take several uses to get comfortable using and find the right combination that will work for you. However, the pump is a poor second to a natural erection, but when you are impotent for a few weeks, it is a good ego builder to see some near normal appearance and function again. lol