Two Men Contemplating the Moon - 1825-30. Caspar David Friedrich / The two men contemplating the sinking moon have been identified as Friedrich himself, on the right, and his talented young colleague August Heinrich (1794-1822). The mood of pious contemplation relates to fascination with the moon as expressed in contemporary poetry, literature, philosophy, and music.
This is discriminated against because it breaks a social norm. Two men together is not what we have seen in decades before us, it is the unknown so it is thought of as wrong. But so was bi-racial coupling before it became the "norm."