as with any 'good' thing, it is possible to exceed the limits of usefulness either by girth or length. no one 'needs' a footlong dick, or one 9 inches around ... but, given the choice, too much girth can be more of a problem. while it is possible to 'take' only half of the length of a footlong trousersnake, the same is not true of girth.
ideally, i would opt for a nice looking cock, above average length and slightly above average girth
ideally, i would opt for a nice looking cock, above average length and slightly above average girth