It's not a one on one correspondence, but you can't deny there is a huge overlap between bodybuilding and gay porn. In fact, many of you don't realize how big an overlap there is. If you have ever competed, I can all but guarantee that one or more of the guys on stage with you has done some version of gay porn (X, XX, or XXX movies, escorted, "modeled" for gay audiences, G4P, G4Charity, G4Pleasure, etc.) A lot of guys on the contest circuit have "other lives" that might surprise you and I'm not talking about the obvious examples like musclegallery. There are many other less obvious venues... and even I have been surprised by some of the guys who turn up in them. In fact, just last week, I was stunned to learn that a bodybuilder whose career I had been following turned up in a G4P venue.
"OMG, not you too!" 
Your parents are proud of your bodybuilding because they have no idea what really goes on in this sport. If they had a clue they might not be so proud. As the old saying goes, ignorance is bliss.
Do you really think the audiences in these two photos are so dissimilar? I don't. 
more exaggerations by Bay, where are the statistics? I have been to BB shows and while there are a good number of schmoes taking pics the majority of the audience is young wanna be teens and 20 somethingers and older diehard bb fans ...the ones that all the nutrition products are marketed too. If that was not true, nutrition products would be marketed to gay men and they are not.
Also I dont know why if a man poses in a picture in a sexual way it is automatically labeled as bad or gay but when a woman does it it is considered good and straight. Thats a double standard. Why cant a man take a pic where he looks sexual without it having to do with gay?...what is the big deal? Why is everyone so uptight?
And why is G4 Charity (whatever that is) and G4Pleasure labeled as bad or illicit and catagorized as porn. That again is a double standard.
Arnold accepted gays openly and enjoyed their attention and befriended many. He thought it was reasonable that they would be fans....he just accepted it as something normal and used their attention, to further is power and fame...very smart man.
"When a homosexual looks at a bodybuilder, I dont have anything against that, I would
probably stare the same way if Rachel Welch or Brigitte Bardot walked by...The same is true with the homosexual - he's looking at the bodybuilder and picturing what he would do with him" --Arnold Schwarzenegger
from 'Pumping Iron The Art and Sport of Bodybuilding.'