"..."This is my body" (Luke 22), you don't believe that."
And you also take this literally? JOHN 10:7 So Jesus again said to them, "Truly, truly, I say to you, I am the door of the sheep.
Truly, truly, Jesus is a door.
In John 10 we see that a metaphor is being given. Observe that a minute later Jesus becomes a shepherd rather than a door, and each time there is an explanation fo the metaphor in direct terms: salvation is by Jesus as entry into the sheephold is through the door, Jesus gives His life for us like a shepherd would give his for the sheep. In the words of Institution ("This is my body", etc) there is no room to see a metaphor: there is no explanation in what sense is the bread now His body and there is an instruction to the Apostles to "do this". You don't tell people to "do" metaphors.