Obviously, if Jesus wanted them to eat His body, it was right there, ready for consumption, it that is what He talking about. The bread and wine were obviously symbolism. God has never advocated cannibalism!!
Drinking blood, forbidden many places in Scripture, was declared by David to be a pagan practice of worshipping other gods:
"As for the saints who are in the earth,
They are the majestic ones in whom is all my delight.
The sorrows of those who have bartered for another god will be multiplied;
I shall not pour out their drink offerings of blood,
Nor will I take their names upon my lips." Psalm 16:3-4
Roman Catholicism, is merely a continuation of pagan worship of the goddess, "Queen of Heaven" to whom the the pope kneels before her graven image!! This evil "Queen of Heaven" cult was known to prophet Jeremiah. They were so evil and beyond redemption that God instructed the prophet: "Do not pray for this people, and do not lift up cry or prayer for them, and do not intercede with Me; for I do not hear you." Jeremiah 7:18
"The children gather wood, and the fathers kindle the fire, and the women knead dough to make cakes for the Queen of Heaven; and they pour out drink offerings to other gods in order to spite Me." Jeremiah 7:18
These round cakes, used in the Catholic Eucharist, are like the round cake in honour of her virgin born Sun God, Tamuz.
Roman Catholicism has carried on this "Queen of Heaven" cult under a new name, of the Ever-Virgin of the Immaculate Conception.