I have sinned

Today I have sinned
I, myself couldn't believe that I did it.
How could I?
It's just wrong.
I will never forgive myself for having done it.
I had never ever done it before.
I feel like punishing myself.
How could I?
How dare I?
I promise that I will never do it again

I will never eat the whole 1 litre tub of coffee ice cream, never ever again.