How is this shit allowed? It's blatant sexism. If you tell that to the tenant looking for a roommate, they will either not care or make excuses to justify it. "But it's not sexism. Females are cleaner than males and I feel safer living with an unknown female rather than an unknown male."

But it is. Imagine if you said the same thing but changed "female" to "whites" and "male" to "blacks." "Whites are cleaner than blacks and I feel safer living with an unknown white rather than an unknown black." There would be scores of outrage. But this is a blatant double standard applied to men.