Like Crohn’s disease
I’ve always described them to my husband like this: “Imagine someone grabbing your testicle with red-hot forceps and start twisting it until you beg to take it off completely.”
Painful and very unpleasant I would guess, especially if they have endometriosis as well.
Like a strong muscle cramp maybe, but with added visceral pain.
Wait men don’t get period cramps?
Going by what I’ve heard, nails lacerating your insides.