Just thought I'd put my tuppence in. I didn't actually buy the STU to help me with performance, I don't really have an issue in that department, I can usually get by with slowing down and using mental exercises to keep things in check. I bought it because I'm a complete perv and quite addicted to masturbating - I'll happily sneak in a cheeky one while the girlfriend is in the shower, or any other possible time.
Anyway, during a horrendous hangover, which always makes me horny as hell, I got to reading about the various SL inserts, and went for the STU simply for the intensity. It only took a couple of days to arrive, and it actually landed at about 8.30 in the morning - I was late for work that day...
I have to admit that although it could never be described as truly flesh-like, when warm I'd say the material is every bit as good as can be expected. I followed the instructions, and put it in hot water - I mixed in some boiling water from the kettle to get it really hot.
With some lube between the lips, running a finger up and down, then slipping in, feels surprisingly convincing. Having said that, I find I have to not look at the thing to keep up any images in my mind. Likewise, running the head of my cock up and down it before slipping in does actually feel rather good.
I was disappointed with the tightness - I'm only a touch above average at 5.5" girth (by 7" if it matters), and I found it nowhere near as tight as my partner. However, the wet warmth felt good, and it was a great sensation to feel it squeezing along my entire shaft, and although it's not very realistic, if my girlfriend could do that, we'd never get out of bed.
So, I took a couple of experimental strokes, adjusting the cap as I did. Although there was a strong sucking sensation with the cap closed, I found it incomparable to any fucking sensation that I've known, so I ended up having it quite loose. The noise that it makes is quite off-putting, and I've since gone on to using it with music playing, or, and this worked really well, watching porn with headphones. This has created some very vivid moments.
The first time around, knowing that I needed to get to work, I didn't really fuck about, I just wedged it between some bars in the bedstead, and went at it doggystyle. Due to the lack of tightness I was actually feeling disappointed at this point, but as the sensation of the bumps grew, I realised that I should be enjoying this in it's own way, rather than comparing it to sex. So I carried on, just enjoying the sensation for what it is, and pretty soon I could feel myself at the point of not return. I decided to come inside it, and gave it a couple of deep thrusts...and Oh My God. As I swelled, I could feel the bumps pressing my entire length, and in particular against my head. I had to just stop, it was way too much to take. I was kneeling on my bed in jaw dropping shock as I exploded, it made my legs shake like crazy. I found that every spurt of cum made my shaft swell again, making the sensation more explosive as it went on. It's impossible to move during orgasm, and even when I'd completely emptied myself I had to just sit there for a good minute before I could pull out.
Although I didn't perhaps enjoy the actual fucking as much as I'd hoped, the orgasm was just out of this world, and overall I think the STU is a great masturbation toy. These days I save it for a rainy day when I can be bothered to go through the prep, and it always needs to be a time when I won't be disturbed as I really do like to use headphones to cancel the wheezing noises it makes. If you really want to blow your mind, don't have sex for two days, then come inside it standing up. You won't be standing for long.
Finally, I'm not sure if this would actually improve stamina in the bedroom for everyone, as I believe that much of that is in your head, and mental exercises are just as effective. I could count in multiples of seven right up to some crazy numbers by the time I was 20