Men have hormonal cycles based on the same kind of monthly period that women do, we just don't bleed. We do know about PMS*, we just don't know that we know (Because we can't identify it with any obvious things like bleeding).
And anyway, I say stick it out as well. It's pretty hot to think of a woman being in discomfort and even pain, and restricted from a number of activities for my gratification.
* I should say, we know about something fairly similar to PMS.





