Listening to the husband and wife and founder team of Jen Blackman Lavelle and Kevin Lavelle -- CMO and Co-Founder, respectively of Mizzen+Main talk about their startup brand at the Brand Marketers Insider Summit and it gives me hope, not just for brand marketing, but for American ingenuity and startup culture. You just know this brand is going to be huge. As difficult as new marriages might be, the couple decided to launch their Dallas-based business in 2012 right after getting married. It was based on a keen insight Kevin had that a significant number of men were looking for …