add that to the fact that women who are breast feeding don't menstruate either rightHAAA HAAA HAAA!! I cannot believe there are still people in the world who think this is so!!!
Get it into your heads - Women DO ovulate and so menstruate whilst breast feeding - everyone who's ever gotten pregnant whilst feeding the first will tell you that.....
PMS IS now a fact of life - learn to deal with it or learn to live with it......
and yes, when there are a large number of women in close contact for a long time(prisons, schools, offices), and don't have sufficient male presence around, guess what, after a couple of months together, they all start to menstruate at the same time!!! If you're the only bloke in a group of 20 or so women, you get EVERYONE cranky at you at one time!! Nice eh?
LTS (guess what part of the cycle it is today.....)