Do you also believe that Christ is a wooden gate and we are literal sheep? Baaaaah.
Christ didn't say He was a wooden gate... He said He was the door and it is both metaphor and literal. It is metaphor because He really didn't look like a door (I'm sure the Gospel writers would have mentioned something about his odd features) and literal because no one enters into His Kingdom except through Him. According to www.Dictionary.com... Door: any means of approach, admittance, or access... I'd say that's a good understanding for Christ.
Is He a shepherd and are we His sheep? If we take Him at His Word, He is our Shepherd... and I will gladly be His sheep. Baah.
You seem to have a problem separating metaphor and literal. Christ said He was the Vine and we are the branches. It is a clear way to understand how we can be one with Christ... and yet separate at the same time. We don't lose our individuality in uniting with Him.
Now, let's talk about the real issue... the Eucharist. Christ gave us metaphors to understand our relationship to Him and Him to us. He said He was the door, the vine, and the Shepherd. Each has its significance for us to understand Him. There is only one place in all of the Scripture, though, where Jesus picked up something physical and said, "This is Me" and that is the Eucharist. He didn't do that with the Torah... though He had touched it many times in His life. He did that at the Last Supper to make what was symbolic of the Exodus from Egypt into reality in Him and our Exodus from death into life. God said that they were to celebrate this feast for all time... and we do, through the Mass.
John 6:60 Therefore many of His disciples, when they heard this said, "This is a difficult statement; who can listen to it?"
Those who see with the eyes of faith rather than demanding to have all mysteries understood. We walk by faith and not by sight in trusting that what Jesus said would be, will be.