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The Guy Who Designed the iPhone Made a New Button
(gizmodo.com)
This is a most excellent place for technology news and articles.
Baby clothing has had this for many years, and I believe male strippers use these to make their pants easy to remove and reassemble for repetitive stripping.
Or just dudes who are lazy but also don't wanna sleep in their pants! You don't necessarily have to be a stripper to enjoy the many benefits of magnetic pants, is all I'm saying.