2014-01-09 05:59:56 UTC
In ancient Greece religion, a bull was sacrificed in front of the temple and was eaten afterwards, as a communion meal. If you didn't eat the flesh, there was no communion.
And so Jesus being the sacrifical lamb - for the rite to work, you'd have to actually eat the flesh of the sacrifice, not 'symbolically' as many modern Christians make out, but his actual flesh.
This was the early Christian interpretation until changed sometime later by the Catholic Church. Who no doubt, felt uncomfortable with the close association to cannibalism.