The muscle guy is Walter Soares, it's a Brazilian gay porno called "Opposite Attractions 2". I absolutely LOVE this scene. Walter is just so fucking HOT! How I ache to be that young guy worshiping the Brazilian muscle-daddy!
I only have the film on crappy old VHS. I have been desperately searching for it on DVD but no luck yet. It hasn't been easy because Brazilian gay porn DVDs are hard to find (well, hard for me to find at least), plus there seem to be ZILLIONS of pornos (both gay and straight) called "Opposite Attractions" or something very similar.....
Thanks for the link large92 - it'll keep me going until I find the DVD.....