Involuntary control
The cerebral cortex can initiate erection in the absence of direct mechanical stimulation (in response to visual, auditory, olfactory, imagined, or tactile stimuli) acting through erectile centers in the lumbar and sacral regions of the spinal cord. The cortex may suppress erection, even in the presence of mechanical stimulation, as may other psychological, emotional, and environmental factors.
Did you see the uncensored photos? There is/was nothing to see! No pun intended.
Definitely was not a comparison to self comment :-pOriginal Post Deleted
Love the reddit comments to the (uncensored) photo,
[–]Vinceat852 47 points 11 days ago
Kinda sad and badass at the same time...
[–]teoteul 34 points 11 days ago
Sadass