Mateusz Banasiuk and Bartosz Gelner in Floating Skyscrapers (2013)

14 minutes in the movie, Mateusz Banasiuk is taking a shower with 3 other guys after gym. We all all four nice butts.
Then Mateusz Banasiuk turns around to wash his dick, and we can see him touching his thick uncut penis.
Other guy next to him is also turning and we see his dick too.
Then Mateusz Banasiuk gets a hot blowjob from one of the guys.

Stanislas Merhar in Dry Cleaning (1997)

In this movie, the sexy Stanislas Merhar is seen buck naked. No frontal nudity but a good view at his bulge in a thin bath towel that does not leave much to imagination.

David Paisley and Jonathan Keane in Unhappy Birthday (2010)

In this movie, David Paisley and Jonathan Keane have a gay relationship. We see them having sex in a scene where we view Jonathan Keane's butt and briefly David Paisley big uncut dick. In that scene David Paisley is the bottom of the sexual act. Later in the movie, they are taking a shower together and we see both of them naked, front and back. They both have big uncut dicks, especially David Paisley.

Federico Pitzalis in Devil in the Flesh (1986)

80 minutes in the movie, after several sex scenes but no male frontal nudity, there is finally full frontal nudity from Federico Pitzalis. The girl starts licking his penis, and as it is getting bigger, she sucks on it. We can see his penis getting bigger by the minute, and his tight foreskin pressuring his throbbing head.

James McAvoy in The Last King of Scotland (2006)

Right at the beginning of the movie, we see James McAvoy in his wet underwear, with a clear bulge.
There are several other bulge scenes later on also.
50 minutes in the movie, James McAvoy only wearing a short undresses in front of the camera. He is slightly remote, so we don't see a lot of details.
We can however see that James McAvoy has a great bubble butt and a rather large uncut penis.
We see again his butt when he is making love to a woman, 74 minutes through the movie.

Sam Rockwell in Lawn Dogs (1997)

At the beginning of the movie, Sam Rockwell strips naked and jumps from a bridge in a river. As he does that, we can see his butt and his dick. He is cut. After his swim, he gets back to his truck naked and we can see him again with a full frontal. Later in the movie, he is having sex with a girl and we can see his butt. His butt looks like a peach with a thin layer of hair.

Joe Gosling in Dream On (2013)

Joe Gosling is getting naked 13 minutes in the movie to go swim. We see his butt and also his uncut dick and balls, hanging in between his legs.

Ulysse Grosjean in Heat Wave (2011)

45 minutes in the movie, Ulysse Grosjean is taking a shower. Fortunately for us, the camera films everything, including his big thick uncut dick. It is filmed sideways, so we get to see both his dick and his butt.