352. Walter Sachers in Das Licht im Kasten (2018?)

 Age: 64?

And old man undressing in theater. Fantastic stage nudity!

339. Oscar Gómez Mata in Kaïros, sísifos y zombis (2008)

Age: 45

 Handsome Spanish daddy showing his penis in a play directed by hmself. Great performance!

331. Martin Wuttke in Der eingebildete Kranke (2012)

 Age: 50

He appeared naked in a play directed by himself. So hot!

322. Leo Bassi in Weird Instincts (2005?)

 Age: 53?

An Italian comedian stripping on the stage. I've seen multiple videos from this perfomrance, but this is the only time when he gets completely nude!

307. Jacek Poniedziałek in Oczyszczeni (2013)

 Age: 48

He loves to show his body at the stage! Unfortunately I have only one photo from this performance.

243. Adam Nawojczyk in (A)pollonia (2014)

 Age: 45

Stage nudity in Polish theater. I don't like the paint on his penis, but the close-up is fantastic! Currently this man is a professor at the drama school.

228. Jiří Vyorálek in Dobří chlapci (2018)

 Age: 44

I've found literally two caps, but he is so sexy. Anyone has more of this?

217. Blaž Valič in Galeb (2017)

 Age: ???

He took off his pants at the stage. I love scenes like that! 

199. Spymonkey in Cooped (2019)

 They did many naked performances, this is the best I've found. Great play!

Aitor Basauri 
Age: ???

Stephan Kreiss
Age: 57

171. René Heinersdorff in Aufguss (2015)

Age: 52

His dick is covered, but looking closely you can see something more ;) Love the close-up.

160. Gustavo Cordera on Lollapalooza (2012)

Age: 51

Naked on the stage. Such a nice performance!

158. Jacek Poniedziałek in Uczta (2018)

Age: 53

He is naked for a long time, but they put a censorship into an online version. Fortunately something went wrong sometimes, so you can see a part of his dick. Very brave performance!

157. Stephan Ullrich in Hamlet (2019)

Age: 59

Fantastic clear nudity and great body. I love when actors get naked on the stage.

134. Marcos Orange in Al Natural (2014)

Age: 54?

Al Natural was a naked theater play from South America - there were different versions with different actors in each country where it was played. Some of them was sexy mature guys, but unfortunately most of the pics in the web are censored. I found some uncensored photos from Argentinean version where Marcos Orange was acting. He is a sexy daddy!

97. Sébastien Thiéry at 27 Nuits des Molieres (2015)

Age: 45

Actor naked at awards ceremony. Awesome brave performance!

72. Torsten Ranft in Erniedrigte und Beleidigte (2018)

Age: 57

Amazing theater nudity, brave performance!

58. Denis Podalydès in Les Damnés (2016)

Age: 53

I love nudity in theater, but this actor showed literally ALL. You can see him from every side. And thankfully, there's a recording in HD. Simply amazing!

33. Peter Aalbæk Jensen at Cirkusrevyen (2018)

Age: 62

This Danish film producent appeared naked on the stage at the alive show. Amazing performance!

31. Bob Hoskins in Mrs Henderson Presents (2005)

Age: 63

Brave old man. It's nice that famous actor would play naked at this age. He passed away in 2014 :(

Bonus cap - other actors from this scene.

26. Dariusz Fodczuk at Festival of Naked Forms (2015)

Age: 49

Polish performer stripped at festival on naked performances. He is also an lecturer in art academy - amazing!