Actually most of the large cocks are really very much just the standard size. if you hold the camera very close & at certain angles the cock appears very much larger than it actually is.
Some of course are enhanced using computer programs. So don't get too despondent as most dicks are in the 5'-7" range.

I'm wondering if many of these "Big Cocks" are photoshopped.

I had my little guy posted there for a brief time. Seems that most folks on this site primarily click on jumbo-size cocks, but there's a fair number of us who also prefer small-and-beautiful.

They attract most attention or activity. If you choose your pics to be viewed by members and friends only then the odds are reduced