just don't do it

If you are ever asked to buy donuts, don't do it.
If you are ever asked to buy donuts at lunchtime, when you haven't eaten since breakfast, don't do it.
If you are ever asked to buy donuts at lunchtime, when you haven't eaten since breakfast and you have just exercised for 80 minutes, don't do it.
If you are ever asked to buy donuts at lunchtime, when you haven't eaten since breakfast, and you have just exercised 80 minutes, and your stomach is roaring and touching your backbone, don't do it.
If you are ever to asked to buy donuts, and then you walk by the sale cart and see Milky Way Dark bars for only 19 cents, don't stop.
If you are only in the store for donuts and yet there are 3 different kinds and you have to pick the yummiest, don't do it.
Don't buy donuts OR Milky Way Dark bars.
Because even though your new resolve for fitness and healthy eating is firm, those sweet treats intended for a school function will call your name.
They will be a siren song, and you will be the sailor on shore leave.
They will be the brazen hussy on the corner, and you will be weak.
You are only a woman.
Just don't do it.