Comedy filmmakers love a big lie. From Fargo to Tootsie to Overboard to Mrs. Doubtfire, the genre is packed with stories about a beleaguered protagonist coming up with an outlandish claim that quickly grows beyond their control. So Kinda Pregnant, out today on Netflix, is joining a long tradition: Lainy (Amy Schumer) is mistaken for a pregnant woman, decides to run with it, then makes a new friend and has to keep up the ruse. Schumer, who co-wrote the screenplay, is known for her joke-dense stand-up sets and for sexually frank movies like Trainwreck. The film has been released under Adam Sandler’s banner, Happy Madison, home of such past hits as, well, Happy Gilmore and Billy Madison. So when you hear that Sandler and Schumer have teamed up on a comedy about pregnancy, you might get a particular picture of what it’s going to be like. But here...