When standing, 8 inches will get you up to your belly button on about anyone.
If you'll look at the 1st and 3rd pics, ... the calves of that tattoo are in line with his belly button, and there's no way his dick is going to go up that far.
In the 1st pic it looks like it might because of the angle (forced perspective) , ...
But in the 3rd pic you can see that it's more likely to come to a line even with the feet or ankles of that tattoo .... like an inch short of the belly button.
-imo-
Also, those little bitty adult entertainment girls are reaching around the girth awfully easily ....
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