Masochist

n. (1) One who shows a willingness or tendency to subject oneself to unpleasant or trying experiences. (2) What Turk is during Lent, sadly without the pleasure usually associated.

To keep me honest here is my list:
1. No candy; excludes gum and mints (LifeSavers, BreathSavers, TicTacs, or chocolate calcium chews).
2. No dessert.
3. No Whole Foods vegan blueberry muffins.
4. Eat out only once per week.
5. Go to the Stations of the Cross on Fridays.

Of course, none of these things apply to Sundays.