Not true.......skinny men appear to have a bigger one because there body is smaller, so in proportion to the body it looks bigger....Plus when i say muscular, i dont mean a big brooding guy, i mean a nice lean muscular.....think Men's health cover model muscular, not Muscle Mag muscular.
In my ecperience women hate that extremly big muscular look (arnold schwarzenegger) or that big with no definiton "water baloon" muscle look. They like the lean muscular look, think Brad Pit
I have met many girls that say they like to be filled up, and met girls who like it when your penis hits their cerviex
Only guys with little ones say things like size dont matter, or average women are only 6 inches deep (that is bs anyway) women are much deepr than that.