It is perfectly reasonable for me to look you in the eye and shake your hand and say to you, "Remember me when you're in Maui and I'm stuck in traffic."
Not so with the RCC concept of Christ's body supposedly being in two places at once during the Lord's Supper.
Says who?
When the Creator of the universe tells you "this is My Body" you don't contradict Him.
Besides, you've never heard of trinitarian theology? Your assertion is the same one the mohammedens use to deny the Trinity.
That may well be, but the only connection between The Last Supper and your analogy is your desire for there to be one. Furthermore, how does one eat Christ's flesh and drink His blood (without which there is no life in you) apart from the Eucharist?