i noted this too. maybe psychological reasons like "im a fat diva so i need a guy who can "handle" me both physically(muscles) and emotionally(calm alpha mind)." but its often times vice versa. very androgenic guys might go for agggressive sex, and a big girl seems to be a bigger challenge,you have to fight more/get a better workout to please her. plus with the fat in the right position eg thighs,a**,legs they look so much more feminine i have to admit!What did you mean by this? The very thick women have an extreme attraction towards very muscular, roided out looking guys? What do you think is causing that, and is there something wrong with the being attracted to hyper masculine men?
and then: the rabbit,horse,elephant theory from kamasutra. high estrogenic fat girls have wide genitalia and look for the more hung androgenic males.