Joe Swanberg

Erection

Joe is a slightly beefy guy who looks like a cross between a game show shot/guy next door/Dexter. He has sex scenes with Greta Gerwig which bookend the movie. In a scene right after the credits, he and Gerwig strip naked. You get several looks at his erect penis as he's sitting on his knees. Certainly a decent size and girth. Later, near the very end of the film, Gerwig is on top of him and pulls his pants and boxers down; his dick pops up on cue. A few moments later she raises up to pull off her underwear and there's a look at his balls as well as his shaft as it is flat against his stomach.

Jerking off

Joe Swanberg makes another ponderous film which he also uses as a good reason to show off his big cock. About 7 minutes into the film, he's shown putting his boxer shorts on, with a side view of what looks like a semi. About 30 minutes in he starts masturbating in the shower, leading to a cumshot. Not sure if it's a real cumshot or simulated, but it's certainly something rare in any movie outside of porn.