1 will lead to 2 which will lead to the whole packet and then you'll be out of ketosis and then you'll feel bad and then you'll want to eat more and then you'll have to get back into ketosis and that sucks. Or think if you don't lose weight this week, that biscuit cost you £35. It's not gold plated enough!
That's just me though. Get yourself some Marigold or a cup of tea or do something to get away from your desk. x