Mutuality exclusive desires, that is wanting to be thin and wanting to eat, occur naturally. Letting go of the desire, a conscious impulse toward eating, may be the missing step. Elimination of the desire to eat, both conscious and unconscious.
This reminds me of the old Greek, who was he? Homer in Odyssey? Lashed to the mast so he could not act, his crew blindfolded and with ears plugged, to avoid the siren calls, temptation.
How does one let go of desire?