Congrats to Adam Sandler and his wife Jackie -- they're expecting their second child! The couple already has a 2-year-old daughter, Sadie. "[Being a father is] a lot of fun," Adam told Jay Leno on Wednesday. "You know what is surprising? That the kid looks through me. The kid... there's no focus... Every time I think the kid likes me I'm like, 'Oh, she's staring at my forehead right now.'" Let's just hope he doesn't name the kid Frankenstein…