Every so often a dance comes along that is just tricky enough to take a little practice but with individual steps simple enough that anyone can do it. Think “Macarena.” Soulja Boy’s eponymous song and dance is in that category and I have been charmed by the way it has inspired an entire category of YouTube videos of dads doing the dance for their kids. Some of the videos are posted by teenagers who think it is funny to see their dads try to be cool. But if you watch them you can see that these are dads who know that what really is cool is jettisoning any sense of dignity to make your children laugh. There is even a group of YouTube videos showing brides dancing with their fathers to tender songs about love and leaving home and then breaking into duo versions of “Soulja Boy” together. You go, Dad!