Doc Johnson's Vac-U-Lock Cock is made specifically for the the Vac-U-Lock system, which has a number of different attachments as well as a few different styled harnesses for a number of combinations. I personally use this Vac-U-Lock cock as my own, and its texture as well as realistic firmness allows me to do just that. It is an extremely realistic feeling and looking penis, so it isn't exactly ideal for those not interested in wearing or taking real penises inside of themselves.

To wear or use the Vac-U-Lock Cock, you must first have something to mount it on. The Vac-U-Lock system has either harnesses or riding-balls that you can mount the attachments on. Snap the plug into the snaps on whatever you will be riding, be it a harness or ball. When you have that done, put any water-based lubricant into the hole and slide in the Vac-U-Lock plug. Always remember to use a condom when sharing!

Note: There is a powder substance that comes with the cock for specific use for the Vac-U-Lock hole. The lubricant, though I'm not sure what it's made of, is a powdery substance that makes the hole in the dildo dry enough so that the plug is easy to insert and remove. Since I am not sure what it's made of, I suggest against using it inside of the hole. Regular lubricant works just fine.

Made of a UR3 material, this cock cannot be sterilized and can only be used with water-based lubricants. Anything else will damage the toy. It should always be used with a condom when being shared because it's very porous. Upon arrival, I opened the box and was attacked with its smell. UR3 smells absolutely horrid, I actually got sick and had to put it away because I couldn't take the scent. From what I've heard, the smell thankfully fades away rather quickly. In contrast to the smell, the UR3 does not have any taste.

The negatives are worth it, though, for the way that this material feels. The flesh feels as close to an erection as I've ever felt not attached to a person. It has this firm inner core that, though able to be smooshed, feels hard when the outer skin is moved. The veins seem to have blood actually pumping under the penis's skin. That's how realistic this UR3 is.

If you like to have your attachments soft, dust a bit of cornstarch onto them, as cornstarch will not harm the body in any way.

What can be said about this beautiful cock? It's become my monster penis, at 8" in length from tip to testicles and a 2" diameter. Yes, you'll definitely want to work up to this erection. The shaft has blue-brushed veins that are beautiful, a skin-like texture and wrinkles in all of the right places. Its head is a light pink color (lighter than in the photos) and is perfectly shape, a mouth-worthy penis head. The testicles are wrinkled, have a flat base, and are fun to touch, for those who enjoy the feel of real/realistic testicles.

The cock's shaft is not exactly shaped like the pictures show. In the pictures, it seems like it has this weird bulbous body when it actually doesn't. It's a straight-out, erect penis that's extremely attractive. The veins are as blue as shown in pictures, but the coloring fades after a few washes. They are a different texture than the rest of the shaft; the shaft is wrinkled, penis skin-like, but the veins are just smooth UR3, much like how veins truly are.

I am a little disappointed because the head is the same texture as the entire penis; it is, however, really realistic. It's one of those heads that's just begging to have a mouth wrapped around it, as its shape is absolutely perfect. I noticed that the color of the pink is a bit blotchy—in some areas, it's hotter pink, in others, it's lighter. Though it didn't bother me, I did kind of feel a bit put off by it.

Where the shaft meets both the head and the testicles is where the "skin" of this penis is really the most lifelike. The skin at the ridge of the head can be pulled away from the shaft, making it feel very much like skin, and there is also a flap of skin near the testicles that can be played with. Though I don't recommend pulling at those parts every day (come on, it hurts!), it really is a nice addition—my favorite part of this penis, actually.

Because of its size, use a lot of water-based lubricant and a lot of foreplay/working up. Unless you are truly wanting to hurt a partner, I strongly suggest heading this advice. This really is a big, big penis. There is a 6" option available, but for this size, do make sure to take care to not injure someone in a way that they don't want to be injured.

The UR3 material warms up to body heat really nicely. In fact, if you're willing to dip your cock in warm water before using it, it will retain the heat for a long enough amount of time to warm up to you or your partner's body heat. Inside of a harness, the Vac-U-Lock Cock does droop a bit, as UR3 is very heavy (and the cock is also really large). Keep that in mind before buying a penis of this material! In use though, it's absolutely perfect. As the wearer, the responses my little girl gave me over this cock were very pleasing.

Because UR3 is so realistic, the feeling of the testicles pressing against the body with thrusts is extremely pleasing and attractive. I also found that, because this is skin-like, it made a nice smacking sound when hit against the cheek or thighs. The places where skin can be pulled were also pleasurable, as my little girl was able to lick and bite at those areas (I swear, she's going to rip another one of my penises).

UR3 cannot be sterilized whatsoever. No amount of cleaning, scrubbing, or toy cleaner will do it. But it can be protected so that you and your partner(s) are all protected, too. Use of a condom with every use is recommended. (I am only using this on my little girl, so we did not use a condom with it.) The toy is very porous, so make sure to be safe rather than sorry (being sorry is never a good thing).

Wash the penis before and after use in warm water with either antibacterial soap or toy cleaner. When storing the Vac-U-Lock Cock, keep it in a plastic baggie and out of sunlight. This will make it so that it stays in good shape. Also, do not store it where it will touch other toys or products; always store it separately in its own baggie.

The UR3 can only be used with water-based lubricants (as I've said quite a few times now). Anything else will muck up the material. If you'd like to, put a small drop of your favorite lubricant on the back of the testicles to check its compatibility.

The Vac-U-Lock Cock came wrapped in a plastic bag, sitting in a Doc Johnson cardboard box with two inserts, one promoting their other products and one talking about how to take care of the material. It's not something worth keeping, and I'm actually throwing it into the recycling bin. (Sadly, the plastic bag cannot be kept either because the material smells so badly, it wiped off on to the baggie!)

The booklet talking about the material said something really strange, a piece of bad advice about using Talcum Powder to keep the cock soft; do not follow this piece of information! Instead, use cornstarch.