Look for the bare necessities
The simple bare necessities
Forget about your worries and your strife
I mean the bare necessities
Old Mother Nature's recipes
That brings the bare necessities of life
To take, steal, or pilfer something seen as unused, under the thief's belief they will make good use of it. Thought of as a euphemism to avoid guilt by believing the victim will not miss the item (or, if discovered, appreciate the act's necessity).
"He has a whole box of Pop Tarts, there's no harm if we necessitake a few."