Seth Rogen & David Letterman Talk about Weed

David Letterman is absolutely fascinated by how the kids these days are smoking marijuana. Luckily for him, unofficial Ambassador of Cannabis Seth Rogen was his “Late Show“ guest on Wednesday, and Rogen indulged Dave’s curiosity about the now-kind-of-legal drug. “Say that you and I go into the weed store, and I say, ’Seth and I would like a joint,’“ Dave asked the “Guilt Trip“ star. Letterman was panicked that weed today is much stronger than it was when he smoked it in the ’70s with Robin Williams, when t