פירוש על עבודה זרה 44:3

Rav’s reasoning for why non-Jews will not engage in bestiality with their own animals applies only to female animals. So R. Kahana explains that it applies to male animals as well. Having sex with human beings will weaken them. Please—do not ask me if this is actually true. And probably not a good idea to google it either. Just go on to the next section.