Lol Good_nuff.

Gentlemen: The average amount of blood a woman loses over the course of her cycle is only 86.7ml, or 4.9 tablespoons, which is barely over 1/3 of a cup... although some with abnormally heavy menses will bleed roughly double that amount. It may seem like more because it'll mix with runnier vaginal fluids on its way out. Much less than the perceived amount.