In an attempt to explain the connection I took out my iPhone and searched for 'Charles Atlas'. In addition to the above image the search resulted in locating another less well known photo of Mr. Atlas who seems to be also Angelo Siciliano 'The World's Most Handsome Man'.
Nice socks Chuck.
UPDATE: I've been informed by a comment to this post that Charles Atlas® is a registered trademark. They also maintain this website which has additional information about Charles Atlas®, however it doesn't include any reference to Angelo Siciliano who Wikipedia claims became Charles Atlas®. More fun stuff here including this ironic quote:
"Our women are too selfish. Mothers going here and there, wearing pants like a man, showing their backsides to people. What is this? They should be home cooking real food and feeding their families instead of out showing their backsides."