Not one specific person......but when there are other thin people around me that I feel are thinner than I am.....it triggers me to want to get as thin as they are....when I'm compaired to another thin person & they are more thin....it makes me want to loose to more or at least get back down to the low weight I have been in the past even though I know it's NOT healthy.......think if they can be thin & healthy....I should be able to be also.