Scarlett Johansson stars in the Scottish sci-fi drama Under the Skin. Scarlett plays an alien who lures lonely men into a mysterious liquid pool. This plot seems to require the men to strip naked before they can be consumed. Her co-stars Joe Szula and Paul Brannigan both appear nude in their scenes, which include erect frontals. Michael Moreland appears later in the film shows a bit of rear nudity during a sex scene alongside Johansson.
Joe Szula
Paul Brannigan
Michael Moreland
DC's Men of the Moment 