Most male gym-goers are DMY’s

I cannot forget what one of my professors said during a lecture on the muscular system about most male gym goers.  He claims that most of them only have health as a secondary reason for going to the gym. Primarily, he says, they actually hit the gym for the aesthetic reward that they get out of it, and consequently raise their “market value” in the terms of physical attractiveness. Then he goes on to say that “most of these male gym goers are actually gay!” He went further to say that they are mostly discreet masculine homosexual and bisexual yuppies who can’t get enough of pumping their bodies with more flesh and muscles for the benefit of attracting other guys.

Now what do you have to say? How much truth was there in his opinionated statements?