Eating Junk food

Hi

we all do this at some point and yesterday, I slipped and had half a domino's pizza - yes i was still on target with my intake and output calories. However today at the gym as i was working out all i could smell was last nights pizza.
Does it really come out of your pores that badly.
Anyone else had a similar experience - I know we all slip occasionally and last evening was my turn, i suppose its ok once in a blue moon .