And to provide a counterpoint, it is amazing how Catholics ignore literal interpretations, except for 6 verses.
so you REJECT the exhortation of Christ too?
you too find it to be too hard?
(More) false witness against the Catholic Church.
The Church teaches that literal interpretation is one taken first, and unless there is a clear context that commands metaphorical or anagogical interpretation, the literal one is correct (at times both literal and allegorical interpretations are correct). The literal interpretation of John 6 is one Jesus Himself is insisting on ("Amen, amen it is food indeed"), and it is echoed by St. Paul in 1 Cor. 11:29).
When Jesus speaks figuratively, He either calls it a parable Himself, or it is clear form context. For example, when He says "I am the door" in John 10, he also calls Himself "good shepherd" and he calls his disciples sheep, so it is clear that He does not mean it literally.
This is not the only case where the Catholic reading is literal while the Protestants tend to explain it away or find metaphors. We take "born of water" as literally referring to water in John 3; we take "baptism saves you" literally in 1 Pe. 3:21; we take "not by faith alone" literally in James 2.