"There can be little doubt that, as far as they thought of the matter at all, Marx and Engels were personally homophobic, as shown by an acerbic 1869 exchange of letters on Jean-Baptiste von Schweitzer, a German socialist rival. Schweitzer had been arrested in a park on a morals charge and not only did Marx and Engels refuse to join a committee defending him, they resorted to the cheapest form of bathroom humor in their private comments about the affair."