I'm a guy, but I've seen my gf suffer through periods enough to know that I'd never be able to handle the kind of pain she has to deal with for days, and she works through those.
Looks like a Canadian company has developed a period pain simulator, and it looks like the most awesome, intense thing ever.
I think every single manager should be mandated to wear one of these for just an hour, where it shuttles between a 3 and a 10. Let's see how many of em give s*** to their employees who are dealing with periods after that. Give women extra PTO off, coz no one should have to work through this.