Except when I don't.
Me (as I stare the the sandwich he skipped eating today) - "Did you make your sandwich for tomorrow?"
Him (as he watches TV) - "Yes"
Me - "Are you sure it was tonight you made it?"
Him (still hasn't turned around) - "Yes - tonight."
Me (trying to give him the opportunity to come clean) - "What utensils did you use? I don't see anything out here.."
Him - "The same knife I used at dinner....."
Me (fed up) - "Dude I've found today's sandwich. The knife hasn't been used. If you don't come clean you're not going to so and so's house for a month - are you sure you don't want to come clean..?!"
Him (slowly turning around and ducking his head) - "I did't make it - it's from today."
Me - "Was it so hard to tell me the truth..?"
Him - "Yeah..."
I then reminded him that lying is slimy. Disrespectful. Wrong. Etc. He doesn't know why he did it and why he didn't come clean earlier on rather than stick with the lie...
But don't worry according to this article it's normal.