Fasting is tough for people in our society. Most were raised to never deny themselves anything that was within their means to have, especially something as easy to obtain like food. A lot of people, myself included, have a real struggle with any type of self denial. Fasting may be an ancient practice found in all religions, but it is one that is rarely heard from, even from the religions, in our modern, westernized, culture.
I grew up an RC and, with the exception of Ash Wednesday, Good Friday, and an hour before receiving communion, we never had to fast at all. The only times we had to abstain were Fridays in Lent (of the great variety). That's around 6 days a year which one was required to deny themselves any type of food. At one time, the RCC had very similar fasting and abstinence rules as the Orthodox due today, but these were gradually modified out of existence over the centuries. It is very hard for a perwho grew up in this type of religious environment to all of the sudden jump into a religion that emphasizes almost constant fasting and abstinence.