How fucked up would it be if humans actually got nosebleeds whenever they were aroused or some shit? Strip clubs would be covered in blood. You could take a blood sample by just showing some guy a pair of tits. A form of torture or execution could just be showing someone porn over and over until they die of blood loss.
I think if that were to happen, there would be less stigma against tampons and they could be bought in any restroom.