... "I deserve it,
I've had a hard day at work" - your boss looked at you funny.
... "I deserve it, I've had excersise today" - yes, you walked the two floors up the stairs instead of taking the elevator. Once.
... "It's ok, I hardly had anything to eat all day" - ah-ha, like only a bag of chips and a doughnut.
... "I only had half of my starter" - sure, you left all the salad.
... "I'll make up for it tomorrow" - yeah, right.