From sealing driveways at 15 to building one of the most powerful customer-acquisition machines in modern business, Kevin Harrington has seen the game from every angle. In this episode of SPX, the original Shark shares how he went from knocking on doors in Cincinnati to helping launch products that generated hundreds of millions in sales.

This is a conversation about hustle, credibility, timing and the mechanics of making people buy. Harrington unpacks the early lessons that shaped him, the wild rise of the infomercial era, how "As Seen on TV" became a force, and why customer acquisition has always been the real engine behind great businesses.