Some of the most immature of my associates are the ones who are careening downwards into butterbargedom.  I used to be friends with one because she was size 6 (my upper limit for acceptable size for average height women) and had all the same fetishes as I do. Now she just looks and sounds like a pudgy moron all the time.  Absolutely no interest in talking to her for an extended period anymore.  We used to have semi-interesting conversations but her fat has clouded her brain and her dumb, equally fat boyfriend seriously has a thousand-yard stare if you try to tell him a joke that isn't in his range of intelligence.