Certainly! Here is a list of 15 male actors who have performed full-frontal nudity in mainstream movies without the use of prosthetic penises, based on the provided information:
1. **Michael Fassbender**
Fassbender appeared naked multiple times in *Shame* (2011), doing so partly to address the lack of male frontal nudity in films, as he joked about doing it for his mother.
2. **George Clooney**
Clooney famously used his acceptance speech at the Golden Globes to joke about Fassbender’s full-frontal scene, jokingly thanking him for taking on the nudity responsibility.
3. **Aaron Taylor-Johnson**
Naked in *A Million Little Pieces* (2018), which he co-wrote, and also had a cut scene in *Nocturnal Animals* (2016), which was cut due to his size.
4. **Jude Law**
Has performed full-frontal multiple times, including in *Eden* (2024). The role involved nudity, which the director Ron Howard was comfortable with given Law’s past performances.
5. **Daryl McCormack**
Performed full-frontal nudity at the end of *Good Luck to You, Leo Grande* (2022). He discussed the comfort created by rehearsing nude scenes with co-stars.
6. **Jack O’Connell**
Nude in *Starred Up* (2013). He filmed a shower scene in cold Belfast, joking about the technical difficulties and being pleased with the result.
7. **Tom Hardy**
Has filmed multiple nude scenes in movies like *Bronson*, *Stuart: A Life Backwards*, and *Taboo* (2017), often expressing a preference for nudity.
8. **Eric Balfour**
Performed real, unsimulated sex scenes in *Lie with Me* (2005), a rare occurrence for mainstream TV and film.
9. **Cooper Koch**
Naked during a shower scene in *Monster* (2024) and in *Swallowed* (2022). He expressed no hesitation about full frontal, though family and friends were concerned.
10. **Barry Keoghan**
Had extended nudity and a dance scene in *Saltburn* (2023), with Keoghan admitting that he was more nervous about the dancing than the nudity.
11. **Jack Reynor**
Filmed a nude scene in *Midsommar* (2019) on the last day, advocating for as much full frontal as possible to serve the story’s purpose.
12. **Chris Pine**
Had a quick nude shot in *Outlaw King* (2018). He discussed the double standard around male nudity and expressed embarrassment about the publicity afterward.
13. **Diego Luna and Gael García Bernal**
Appeared fully nude in *Y Tu Mamá También* (2001), sharing intimate scenes while in their 20s, with shots serving social and narrative purposes.
14. **Kevin Bacon**
Nude in the shower scene of *Wild Things* (1998). The original scene included a kiss with Matt Dillon that was cut for being too explicit.
15. **Ewan McGregor**
Has appeared nude in numerous films, such as *Velvet Goldmine*, *Trainspotting*, and *Young Adam*, openly embracing nudity as part of his acting.
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These actors have made significant contributions to breaking taboos around male nudity in cinema, often pushing the artistic and storytelling boundaries.