Both Helmut Huxley and Raphael Nyon are beautiful guys, have great bodies and love sex, so I think we can forgive them bad acting skills in the opening to this clip.
Raphael has joined the growing list of boys who seem to want to follow in Kris Evans footsteps and find their place in the bodybuilding/ fitness instructor world. Raphael is lucky in that Kris is his actual trainer, and we certainly can see the result.
In our scene today, however, Helmut has an easier path for Raphael to follow to achieve his goal of big muscles.... according to our Czech charmer by sticking his asshole on Helmut's dick, his muscles will get bigger. You be the judge as to whether it works here or not.