Most of these have been covered, but here goes:
- Periods (not JUST bleeding, but hormone changes, skin breakouts, mood swings, sore boobs, stomach cramps, expensive sanitary items, so on and so on)
- Being kicked in the crotch hurts women just as much as men. The pubic bone is REALLY painful when something impacts against it, and if you're unlucky enough to manage to strike the clitoris against something, (corner of a chest of drawers, from personal experience), it hurts beyond words
- Sexual discrimination. Say what you want, even in Western cultures its still rife. Try being a woman somewhere like Iraq, where a woman who is raped is punished for it, or in places where they still practice female circumcision (for a comparison - a male who is circumcised can lead a normal, healthy life. A woman who is circumcised has her genitals butchered, and is completely incapable of enjoying sex. In some cases, they go as far as to seal the vagina completely to ensure virginity until marriage).
Make no mistake - it IS easier to be a man. Sure, I can see the arguments about morning wood, but thats a minor inconvenience compared to the things above. The only arguments against that I can see are divorce settlements and things like car insurance being higher. I think the way divorce is handled is ridiculous - it should be assessed on a case by case basis, and never assume that the woman should automatically get custody and more money. As far insurance, I'm pretty sure that is based on stats showing that men are more likely to make high insurance claims (if I'm not mistaken, women have higher numbers of small accidents (a bump while parking, for instance) and fewer bad accidents, while it is reversed for men. I might be wrong, but I swear I heard that once).
TL;DR - its harder to be a woman.