Do speaker cables need a burn in period?

fortunately all we have to do is burn in our cords and equipment, change some directions, and see if it matters to us...all free,  all easy...maybe even fun for some

Does anyone have a link, or some sort of closely-associated material, where quoted 1937 experiment by Mr. Young could be read about? Google brings mostly this Mr. Feynman's speech, but no actual experiment documentation.

For whatever it is worth...

"Limited information exists to the precise identity of Mr. Young, though it’s likely that Feynman was referring to animal scientist Paul Thomas Young. Young, did, in fact, work with rats, but no study as Feynman describes is listed in his published works. So we’ll have to take Feynman’s word that the study was indeed conducted."

https://www.realclearscience.com/blog/2014/02/the_rat_experiment_you_dont_know_about_but_should.html

Now, given that Mr. Feynman has been extensively quoted here by the likes of....(you put your favorite poster here)…., you have to decide for yourself if you will take his word on anything that is not strictly physics. 

At least geoffkait won't send someone attacking me on the highway.