I believe it was Albert Einstein who said, “Parents just don’t understand.” Got that right, Al. Especially when it comes to the Sports Illustrated swimsuit issue, which way too many over-protective moms swiped before we got our pubescent paws on it. Now that mom is (probably) not getting your mail anymore, you can see all the sumptuous skin you missed the first time around. Sports Illustrated Swimsuit: 50 Years of Beautiful ($32.50) is 304 pages of Christie Brinkley, Heidi Klum, Kate Upton, and overall a definitive retrospective of the iconic issue. Take that, ma.