Review: Fun Factory Duke

The Fun Factory Duke is a silicone prostate stimulator. The stimulator comes in two parts–the insertable portion, which is made out of 100% [platinum-cured] silicone, and the vibrating bullet, made out of ABS plastic. The vibrating bullet is not intended to be used by itself, it is intended to be used with the silicone portion.

The Fun Factory Duke was given to me free of charge from Castle Megastore for review. My review and opinion are completely honest. Thank you Castle Megastore!

First Impressions

When I first got the Duke, the first thing I did was test out the intensity of the vibrator. I was surprised to discover that the Duke’s bullet was much stronger than I hypothesized. However, because of its strong power, it does come off as much louder compared to other vibrators that I own. I have to assume that the strength of the vibrating portion is necessary since it has to be able to transfer the vibrations on to the rest of the silicone part of the toy.


The charging portion of the Duke is unique. It uses a magnetic charger that attaches to the two metal contacts at the base of the bullet. I’m going to have to guess that this was done to keep the entire bullet sealed from water. The Duke is advertised as 100% waterproof and I am certain that having a charging port would compromise the ‘waterproofness’ of the bullet.

One of the best design features about the Duke is the fact that the vibrating bullet and the silicone insertable portions are completely removable. This by itself is 100% necessary in being sanitary and clean with toys that are used anally. I am able to soak the silicone portion in a 10% bleach solution to sanitize or even submerse in boiling water without having to worry about damaging the vibrating bullet.

The insertable portion of the toy has a ‘bulb’ that acts as an anchor once it is in place. The bulb is convenient because it helps maintain pressure against the prostate when in use. This is necessary in a prostate stimulator–most prostate stimulators that I have used don’t stimulate the prostate unless they’re pushed or held in place.

Fun factory duke in use

Image from the Fun Factory Duke video

My Experience

As with any silicone toy, I used Sliquid H2O to insert the stimulator. The extra bulb-anchor made me think that it would be difficult to insert; but I found that this was not the case. The bulb is relatively slim and went in without much of a fuss. Of course, this was only possible because I was relaxed and I used sufficient lubricant.

Let me just add before I continue: the Duke was held in place without any help. The bulb-anchor kept the toy held right up against my prostate and it made no threat to slip out.

Once inside me, I turned on the Duke. I enjoyed the fact that the Duke stimulated me in just the right spots. I didn’t have to move it much to actually get stimulation. Once it was touching me in the right place, re-adjusting it or myself was not necessary to feel the full effects. I wasn’t able to change the intensity of the vibrations, but I did not feel that it was necessary to do so.

It was such a blissful feeling to have my prostate being massaged without moving. Just lying in bed with my eyes closed, not worrying about moving around the stimulator or having to re-adjust it constantly as with other massagers. The stimulator stayed at one speed the whole time (there really aren’t more than one speed).

For me, the lack of speeds or intensities did not disappoint me. I personally dislike having so many speeds and rhythms on vibrators.

Care and Storage

The Fun Factory Duke has two separate portions that make one whole toy. The vibrating portion and the insertable portion. The insertable portion is made out of silicone and can be submersed in boiling water or it can be soaked in a 10% bleach solution. This is an amazing feature of the Duke since all anal toys should be sanitized and cleaned often.

The vibrator can be cleaned with soap and water. If it is inside the silicone while in use, it should not get dirty since it is not inserted anally.


Conclusion (tl;dr)



  • Vibrations are strong
  • Sleek body allows for easy insertion
  • Magnetic charger makes it easy to charge
  • Separable, allowing for cleanliness and sanitation



  • Can’t change vibration intensity may be a con for some
  • Needs manual adjustment at times


The Fun Factory Duke is one of my new favorite prostate massagers. The vibrations are strong and really travel well into the prostate. For the most part, the stimulation can be done hands-free (which is my favorite kind). Prostate stimulation is different for every person–not everyone can have a prostate orgasm, but the Fun Factory Duke can definitely help achieving that.

Affiliate links have been used in this post.

Where to Buy

Castle Megastore (Not Currently Available) | SheVibe



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