How long a penis should ideally be? -
5-6 inches long while erect
varying while not erect a.k.a. flacid.
The average length for an adult human hovers somewhere around 6 inches erect.
The -Ideal- length should be whatever you are comfortable with (It-s not attached to anyone else, after all).
Its not the size,
It only matters how many times
You can make it rise...
But its not the size that matters its how you use it.
Regards:Sky
And 3-4- flaccid.