Steven Sashen is a serial entrepreneur who has never had a job, a former professional stand-up comic and award-winning screenwriter, and a competitive sprinter — one of the fastest men over 55 in the country. He and his wife, Lena Phoenix, co-founded the footwear company Xero Shoes, creating “a MOVEMENT movement” which has helped hundreds of thousands of people Live Life Feet First with happy, healthy, strong feet in addictively…