Dear iranger,
"Sorry, I still don't see how ABC necessitates gorging."
It doesn't. One needn't gorge, either, to vomit what one eats.
However, just as bulimia permits eating without regard to limits or natural consequences, artificial contraception permits sex without regard to natural limits or natural consequences.
"...but note that I included fortified foods such as breakfast cerial along with diet soda in my example."
I don't eat breakfast cereal, nor do I drink much diet soda. ;-)
But seriously, the analogs to "fortified cereal" with regard to sexuality would be Vitamin E tablets, I think. At most, it might be analogous to using NFP to actually try to conceive, rather than to avoid conception.
After all, the "fruits" of eating are nutrition of the body - to provide energy and necessary nutrients, as well as the pleasure of eating. The "fruits" of sexual relations are procreation and mutual love. As adding vitamins to one's cereal is used to boost the nutritive value of food, it would be analogous to using NFP to boost the chances of conception.
It certainly wouldn't be analogous to voiding one of the fruits of sexual relations.
Diet soda is a better analog. It's ironic that some studies suggest that drinking diet soda provides little benefit over drinking sugared soda, as it seems that the artificial sweetener "tricks" the body into thinking it is absorbing sugar, and the body acts accordingly.
One wonders whether a similar effect carries over to the other side of our analogy.
However, the analog to diet soda would be, say, a vasectomy, where the "caffeine" has been removed. ;-) And that is no longer contraception but rather self-mutilation. A slightly different topic.
"People eat it for a variety of reasons (lower cholesteral, energy boosting, nutritional) and because it tastes good."
You've really only named two reasons: to maintain good health (if one doesn't eat, one dies, if one doesn't eat properly, one dies), and for pleasure. Again, adding nutrients to one's cereal merely increases the physiological effect; it doesn't void it. Thus, here, your version of the analogy fails, and fails badly. Adding nutrients to increase the positive physiological effect - nourishment of the body, is actually the opposite of artificial contraception, which voids the normal physiological end of sex - procreation.
"Along the same lines of reason, ABC is used by people for a multitude of reasons but it does not necessitate gorging yourself on sex but rather allowing couple to engage in intercourse at a time that is desirable to them."
Not all bulimics gorge themselves every time they're going to vomit. However, the bulimic act permits the person to eat without thought to the otherwise normal and natural consequences of eating.
I could stretch the analogy further (there is evidence that not only is it important to consider how much one eats, but also, when one eats what one eats, so there is an analog to your statement about having sex when one wishes, etc., etc.) but the purpose of analogies is not to show that two things are identical, but to illuminate through comparison.
The analogy from Brian Kopp does that very well, at least for many people.
sitetest
But by definition, bulimia is binge eating followed by purging and that is just the physical characteristics of the disorder. Once you start considering the emotional complications involved in bulimia, the analogy gets even more difficult to make. So like I said, neither analogy does the topic justice.