I cant help but think that a cock whose girth is 6.5 is as thicker than mine as mine is compared to a cock whose girth is 4.5. Yes I have a girth of 5.5 and if I think of a thin penis I think of 4.5 inches of girth. So... As a matter of fact my penis is a pencil in the eyes of a lucky man whose cock is 6.5 inches girthwise or a girl accostumed to fuck such size.A full inch accounts for a HUGE difference both visually and functionally as much as a footof difference in height for example. This is also why I tend to refuse to believe claims of penis as thick as 7.5 inches or more. On the other hand cocks as thin as 3.5 inches or less are extremely rare I suppose.