The simple answer to this is hormones. A girl or woman's hormones fluctuate significantly during their menstrual cycle causing heightened emotional responses and mood swings.
Because the girls are having mood swings while they are on their periods. And it cause them to be short temper and everything when mad them mad really easy
Girls have had periods since well, ever! A period is when blood is realised out of a girls vagina. That's it basically
find out why she is mad at you and then work out your problems.
no that would be kinda cool though...girls running mad around the house...getting bad moodlets for almost everything that happens lol...you should request that to the sims people....ea games
Periods have nothing to do with sexual orientation. Lesbians are just as capable of menstruating as straight girls.
Yes all girls start there periods between the ages of 9-16
No
Periods
Girls are sensitive!
Girls use kotex during their periods.
because they had their periods and became very mad
Most girls will start their periods between the ages of 11 and 14. It can start earlier or later than that though.