I guess it makes sense that companies which produce mufflers, tires and manifolds would target a heterosexual male audience. Let's face it, that's probably 99 percent of the people buying these products. So, it doesn't surprise me that automotive equipment suppliers would utilize the tried and true "sex sells" principle. What DOES surprise me is the extent to which they utilized the principle in the 1970's.
I made this point many times before on Retrospace: when you look at the culture of the 70's, really look at it, the cultural difference that stands out most is the extremely uninhibited attitude towards sex by the general population in the 1970's. I don't doubt that it still exists today in some form, but take a look through some of my posts on the subject and you'll see fairly quickly that things were just plain different.
Well, I guess it's time for me to quit rambling, and show you some automotive equipment sleaze. Enjoy!