Stonn wasn't in Plak Tow in "Amok Time."
Quite possible. Then again, perhaps Spock was so badly off in comparison because he had his human weakness to exacerbate the situation. Stonn did appear about as emotional as, say, the affected Tuvok when T'Pring removed him from the fight equation.
Didn't "Blood Fever" rule that option out?
And then "Body and Soul" revealed that this, too, was less than a rule and more like a Rule of Acquisition.
It shouldn't surprise anybody that most things about pon farr would be myths and misunderstandings and deliberate exaggerations, some acknowledged by the Vulcans themselves, some issues of bitter denial...
Timo Saloniemi