Catholic rituals are especially insidious, because they are so heavily cloaked in metaphor, allegory, and a kind of hypnotic mythological symbolism. You're conditioned to split your understanding of cannibalistic nature the rituals, from an EXTREMELY early age, through the use of repetitive language, music, and ceremony.
For example, the communion ritual includes the VERY SPECIFIC phrase "Body of Christ", chanted by the priest over and over, to each person in line who receives the communion wafer (a thin tasteless disk of yeast). After hearing that phrase droned repeatedly, you start to "forget" what the words actually mean - consciously, anyway. It becomes simply a kind of rythmic audio pattern, that accompanies eating something awful that sticks to the roof of your mouth.
I found I had to concentrate hard, to keep the picture of "flesh" and "blood" in my mind, and not let myself get lost in the hypnotic nature of the mass.
I also find now, that this is why I have so much suspicion and hostility for meditative practices -- and I believe it may be why its impossible to hypnotize me now.