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.

19. Mark Rylance in Intimacy (2001) [1]

 Age: 41

This movie is full of amazing scenes of unsimulated sex between well-known actors - amazing!

I'll post more soon.