what is "real" life? I just bought a coffee, but didn't make it myself, a machine did. is it real?

Yeah. You drank it, right? You weren't watching a character drink a machine-made coffee on a screen.

And your girlfriend who was looking at instragram while she was walking with you, was she looking at the pictures, or was she watching another character look at them?

She probably smelled way better than her avatar.

(And if you think this is just being crude, then something essential and primal has been lost for you.)

Not if she's a WoW player...

All your inputs are via wires. Some of them are short wires, and made of meat. But you have no direct senses.