Maybe there is no way to stop liking sugar, but there may be ways to like other things ''more'', thus avoiding the need to satisfy the need/want with sugar by filling the time and desire with another want.
It is much easier to shape a behavior toward another behavior instead of stopping the unwanted desire (I posted a review of an application of this method to parenting). So one way might be to shape toward liking bitterness more (as recommended in another comment - but somehow I don't think that would be strong enough.
I'd rather guess that sex and sport (those kinds that produce your own drugs like long distance running), a demanding but satisfying family life can be ways to shape away from the habit of eating sweets. I also notices that significant life changes (however they come about) pose a chance to totally alter ones habits (for example I totally quit tv when starting my first relationship - I had better things on my mind and nevel looked back).
Not having sweets at home and not being able to buy them (e.g. by having someone else do the shopping or shopping seldomly) could also help.
I have a deal with my girlfriend that if she buys some sweets, she is supposed to put them in a specific place, where I am supposed to never look (as opposed to leaving them in a visible place).
Kurzweil calls sugar the great white Devil.
Seinfeld contends that cookies should be called chocolate-sons-of-bitches.
Once upon a time I was paleo, and didn't feel carb cravings. But being paleo all the time is nearly as hard as being polyphasic.
There must be a final solution. The lone star tick equivalent for sugar.
Is there any effective way to stop liking sugar, chocolate, cheesecake etc??? Medidation, allergy, neural training, traumatizing, association learning, operant conditioning, transcranial stimulation. Anything that will stop my hands from eating those damn, evil, malignant objects?
I just don't want to have my Cryo-Lapid saying "Here lies he who was born with one or two standard deviation greater desire for the set CnH2nOn (n is between 3 and 7) than the other members of his species, and whose IQ, many standard deviations above was not able to contain such desire".
I know dozens of others here face the same problem. Can't we solve this? It appears much simpler than world domination, moral uncertainty, FAI and CEV.
Edit: I know this is unusual, but I'll try to compress my responses to the suggestions given to me in particular (thanks by the way) here:
On inducing nausea and vomit along with sugar: I tried totally didn't work. Feel free to laugh at me. http://lesswrong.com/lw/h9b/post_ridiculous_munchkin_ideas/8ykn
On noticing what it feels like later: I totally feel ok after gorging 200 grams of white chocolate. I mean it. I feel nothing. I'll have it with mountain dew and cinnamon if you prefer.
On overeating to get traumatized: When I was 18 I decided to stop eating sugar, I bought about 5 kilos of ultra sugary stuff of all sorts, and I eat them over the course of a few days. I stopped for a bit, but soon regained my strength and desire.
On increasing desire for bitterness instead of decreasing for sweets: Bitter things taste terrible. I hate coffee, beer alcoholic drinks, arugula, scotch, anything that people call acquired tastes. I kind of commit the mind projection fallacy, and somewhere deep down, I alieve that people also hate all that stuff, but they pretend they like it for the same reason they pretend they like suits and ties.
On forgetting system one and just using the classic system two avoidance (not going hungry to supermarkets etc): I do this, but it is insufficient (It's sufficient to avoid making me fat, not to avoid making me unhealthy).
On making deals so that those around you don't expose sugar to you: Yes, I make those deals, and they help.
On munchin and spitting what you want to hate one at a time: Will try, will post results later.
On changing your sense of identity into "I don't like sugar": I do that with other stuff, and it is very effective. I don't want it to fail with sugar and therefore cause me to trust my overall identity less, so I'm not trying it with something with such high likelihood of failure, but others who like sugar less should try.
On having more Sex and Sport: Tried, helps to keep healthy and looking good, makes no difference whatsoever in my desire for the high octane devil.
Slowly progressing to dark chocolate: I don't love chocolate, I love sugar. I tolerate milk chocolate so that I can get that fuzzy sugar deep down my tongue. If all the cocoa in the world disappeared tomorrow, my life would be worse, because on fewer occasions other people would be eating chocolate that is too bitter for me (like chocolate cakes and such) and thus I would have even more occasions to infect myself with the disease agent. Thank goodness for other (crazy) people liking dark chocolate.
My overall take is, thanks everyone, I'll try the spitting thing, I had already tried nearly all strategies suggested here, and I thoroughly ask for recommendations besides those above.