Along the lines of the evil evil food porn poll
This is something I used to fantasize about. What one single food do you wish you had magically never eaten. This means a fairy godmother comes along and every morsel of that food that has ever crossed your lips vanishes and its LIFETIME TOTAL calories with it...and the pounds those calories are worth. You have to be careful, because if you pick something you used to eat a LOT of, you could vanish into nothing. So say you used to drink one coke a day for 30 years, if you pick coke at 120 calories x 365 x 30 = 1, 314, 000 calories /3500= 375 POUNDS would vanish instantly - killing most of us.
Caveat - if it is a healthy food...the nutrition from that food vanishes too.
Also. You may never ever ever ever ever eat one morsel of the food again.
For me it is potato chips. I never liked them all that much and I think I have eaten them just often enough that they would be about 20-30 lbs. (doritos on the other hand would vanish me )