"It is a total shame that those supplement companies use busty, gorgeous women in advertisements next to ridiculously huge men. It's sexist! No one will ever get that big using those supplements!" - your girl flipping through a fitness magazine. People who mock or complain about those advertisements have not been paying attention. It is the oldest trick in the book. Sell with the fantasy of what you will do to yourself and who you will attract.
Dude with genetics geared for huge muscles and most likely using 'gear' and some supplements to get huge next to the 2007 Miss Bikini Universe with some good photo-shopping and a sexy look on her face. Pretty standard fare for supplement advertisements. What about the 1960s? Those advertisements were probably more focused on nutrition.