Boston’s Museum of Fine Arts is not the first venue in which you would expect to find an auto show. But there in its stately galleries are 16 vintage cars in all their glory, and they are there for a very good reason. “For car guys, the MFA’s nontraditional exhibition offers a rare chance for time with some of the world’s rarest and priciest racing machines, a collection built largely over the past 30 years by the fashion designer who created Polo. For the museum, the show has another function: to reach more men. The museum, noted for its flowery Impressionist works, says women visitors outnumber men, 64 percent to 36 percent.”