Ok just so we are clear, Fordyce's Spots and Pearly Penile Papules (PPP) are two completely different things.
The picture the OP has linked is someone with PPP
NOT Fordyce's Spots.
This is Fordyce's Spot,
Fordyce's spot - Wikipedia, the free encyclopedia
This is Pearly Penile Papules,
Hirsuties papillaris genitalis - Wikipedia, the free encyclopedia
Both are very common among adult men, and are completely harmless, not contagious and do not require any medical attention. If you are concerned about the look of them, there is treatment available but it really is not worth it.
And I should know the difference, I was blessed enough to have both!
However, as with anything regarding your penis when in doubt see a doctor.
Q.