Don't ya bet it was a man who said, "hey, let's put 'have a happy period' on the wrapper"?
User Name- I have had cramps come and go over the years so maybe that's not unusual for it to change, I don't know.
I had them bad as a teen then a little better in early twenties. As I think is common for many, they were better after having kids. At some point in my forties they came back. I'll be fifty soon and most months I have them, some I don't.
I've had my kids and I wish I were done with the periods. I've always thought there should be a switch you could hit.