It's a Mystery, Now Isn't It?

Lift the memory carefully.
Caution, edges may be sharp.
Season well before use
With vegetable oil.
Carefully slide Tab A
Into Slot B.
Do not use alcholine batteries in this brain
Positive and negative voltage terminals are marked with plus and minus.
Knock knock who's there?
Two whole eggs and a cup of milk.
Mix well and add to dry ingredients.
Colors of the memory may vary.
Side effects may include
Itchy, watery eyes
Chest congestion
Untimely death
And herpes.
You have the right to remain aloof
Anything you say can and will be used against you
On trial by a jury of your peers.
There's no going back now.
Caution: Contents may be hot
Objects in the rearview mirror
May appear closer than they are.
First two lines found over here