The RP Project #6: Stamina Training Unit (STU) Fleshlight

The sixth review of the Rubber Pussy Project discusses one of the most loved Fleshlights – the Stamina Training Unit a.k.a the STU. This Fleshlight is sold as a special FL designed to be extremely intense so the user “trains” himself to last longer in bed. After following the rules established for the Rubber Pussy Project lets go with the review:

First Impressions:


This Fleshlight is sold as a training tool to last more in bed with a real partner. The idea behind this sleeve is that it is so intense, that if you achieve  to last 10 minutes using it, you should last about 20 minutes with a partner. When you look at the texture, it is a series of close “pillows” that surrounds your penis at all times and a slightly narrower canal. At first sight it doesn’t look as impressive or as that intense – an initial impression that the sleeve soon proves to be a wrong one.

Intensity (5 / 5)

The STU looks like is not too intense – but looks are deceiving. The STU texture makes itself present since initial penetration and remains present through the whole session, making you huff and puff the whole time. The sensations are uniform along the penis, but the closer you are to orgasm, the tighter the sleeve feels making you to do one of two things: You speed up the pumping / humping to orgasm hard or you slow down to prolong the pleasure. The orgasm option is easy, the control part is extremely difficult. After just 5 to 10 minutes of use, I had to use all the tricks I know to avoid ejaculating – breathing exercises, stopping humping / pumping the FL, thinking in other things, or even adding lots of lube to lessen the sensations and extend the session. When finally I couldn’t hold it anymore, the orgasms with this sleeve were intense and satisfying, leaving me spent and waiting for the next session. 

Tightness (4/5)
STU is a pretty tight sleeve and it feels tighter as the penis expands near to climax. Using the end cap gave the sessions a tighter feeling, but not an overpowering one.    

Realism (2/5)
This sleeve doesn’t want to simulate any sexual experience. As written above, its job is to provide your penis with constant stimulation – and it works as a charm. 

Versatility (5/5)
The versatility of this sleeve will depend on what you want. If you want to cum quickly, then using the STU as a stroker works as a charm. Pump this sleeve for 5 to 10 minutes at moderate speed and you will be rewarded with an intense orgasm. On the other hand, if you are looking to last longer in bed, the STU helps to practice edging and control techniques – be warned that those techniques are easier to do when having hands free sessions. If you are like me, wanting to have long and intense sessions, the STU is kind of problematic. It is so intense that 15 minutes into hands free sessions I felt the desire to cum, requiring me to use a few tricks to avoid finishing before the desired 25 minutes.  That variety of uses makes the STU one of the best sleeves from the Fleshlight roster.

Lubricant use (3/5)
The STU is a lube hog if you are training to last longer or like long sessions. It required regular re-lubing, sometimes three times during a session longer than 30 minutes. If you are using a STU for a quicky, you probably won’t have to worry much about the lube.

Use (3/5)
Some whistling and other air noises noticed when using as a stroker. Whistling noises were common while having the end cap fully tightened. when completely removed, I noticed some scrapping noises similar to passing your fingers through a plastic hair comber. Additionally, the material had become sticky during use, something easily fixed applying lubricant to the entrance of the sleeve.

Hygiene (5 / 5)
As all Fleshlight, the STU is pretty easy to clean – just open a faucet with cold or warm water and allow the running water to flush the interior.

Drying (5/5)
Relatively fast drying when using the hanger method.

Maintenance (5 / 5)
No special maintenance except an occasional corn starch on the surface.

Tear and wear (5/5)
After the 5 use run, no tears or wear reported.

Total score: 42 / 50

All aspects considered, the STU is a good beginner’s sleeve for users with Death Grip Syndrome (DGS), those looking for quick sessions, and those looking to practice techniques to delay ejaculation. 

As any Fleshlight, you can buy the STU directly from Fleshlight.com.

FYI: The visual stimuli for these sessions was provided by Private’s Sex City series (volumes 1, 2, 3). Highly recommended!

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