It is more complex to me than just dick length. for instance, I find guys with very large dicks visually stimulating just looking at their bulge. But then I find them less stimulating in the nude. Those real big guys look so sexy in their speedos. But in the nude they just aren't as appealing as guys with a smaller dick.
For me it is the smile and eyes first, then the ass. A great looking ass turns me on faster than anything else.
Those broad shoulders and perfectly trimmed waist line is also a great turn on for me.
I find the thighs also a turn on.
On a French site that had small, average and then big dick pictures, I found that of the ones they had posted, the small dick guys were the most stimulating, even in the nude. The guys they selecting for the above average dicks just weren't appealing. Sometimes the dick jsut looked TOO big for their body.
To me, the male human body is the greatest art form. It is the whole picture. pics of the Greek gods. They are a turn on for me.
( I know I am falling for guys that are centuries old and are dead and somewhere in the ground but what the heck they still are eexy.)