Let the headline puns and innuendoes begin, these three included: Fifty Shades of Grey whipped up $8.6 million in late Thursday showings, a blistering start for a Valentine’s Day box office weekend that’s sure to dominate the record books. Early tracking on the erotic love story had it hitting something like $60 million over the long President’s Day weekend, but many who like to watch, ahem, the box office, suspected it would come in much higher.