Most of the Web "experts" declared that the proper way is the "over the top" method, supporting the B-I-L's stance on the subject. My preference though, due to years of habit, is the "under" method—the way my Mama taught me.
Undaunted, I continued researching until I landed on an article by Brian Mathis on his blog. I now consider Brian, who writes about technology, to be a renowned authority on this vital subject. And I consider myself fully vindicated, even though one site I viewed had surveyed its users and reported they preferred the "over" method by about 10:1.