The only time I would really see this as being possible is if they are feeling this way while their significant other is having their cycle. It could rub off on them the same way that hormones during pregnancy effect the father of the child. Otherwise, they are just crybabies looking for an excuse.
Oh the grand man period conspiracy. How many people were polled to come up with this 25 percent figure? I'd like to know how many imbecile men are in the UK lol.
Whaaat!!!! Tiredness, irritability, and cramps!!! That's not called a male menstrual cycle... that's called life!! This 25% needs to look into their diet, exercise habits, and stress management. These seem like symptoms of overworked, overstressed, undernourished men. Not , men who all of a sudden developed a menstrual cycle! Please!!