well, why i grow superhots?
it´s strange but i have the feeling that my mouth isn´t sensitive enough as it was in former days. i got used to hot stuff and now i want it hotter and hotter. and such strains appearing every now and then claiming to be the most pungent ones would save my day
Actually, this is likely to be accurate. It's not just a matter of becoming accustomed to the heat: your body chemistry is changed by it.
Without getting too chemically technicial, capsaicin and its analogs bind to the VR1 receptors creating a large ion flow. At some intensities the "overloading" can produce an analgesic (pain killing) effect that lasts up to a couple of weeks. (National Institutes of Health and a couple of Universities are working on capsaicinoid derivative analgesics for intractable pain (like that due to cancer or certain types of nerve damage).
If you heat very hot foods fairly often, the cells that detect pungency have been overworked to the point that they just don't respond to low intensity heat. (Good analogy is how the same amount of sun light gives you a sunburn in May and a tan in August.)
Most of us have heard about the chili-head high, likely brought on by the body's release of endorphins to respond to capsaicin. Coupled with the analgesic effect, this makes a lot of sense.
Finally, for those that are seriously demented pepper-heads: latest research indicates that very high concentrations can actually kill the nociceptor cells. Sounds like a bad thing. However, the cell death is very selective and seems to take out severe neuropathic pain with denervating (permanently numbing) an area. Very positive results are coming out of research on this in which the equivalent of pure capsaicin is injected into the dorsal ganglia (those bunches of nerves that branch out from between your vertebra). The selective nocipetor death has killed intractable pain in rats and monkeys without affecting other sensory functions.
So... if you've hammered your tongue a few times with Blair's 6AM reserve, you just might not need numbing for your next root canal.
mikec. pres., mc3 research
PS: To the orignal question on "Why Superhots?"....
For me it's a matter of making sauces my way. I can buy two ounces of 1M scoville oleoresin capsacin that is sufficent to ruin food, and it costs nearly nothing. However, these extracts are almost universally made using chemical solvents that are toxic, so the extract has to undergo a second process to remove the toxic solvent. Rather than use an extract, I prefer to make my own product that has flavor and heat -- and that is made using non-toxic materials. I also make use of the whole plant, as the depleted plant pulp can be dryed and used for a variety of dry rubs or included as a natural thickening agent in recipes.
Finally, for the seriously obsessed, if been working on high performance, low-energy sealed system extraction apparatus. I'd be interested to hear from others that are doing their own extractions.