Goldie Hawn and Kurt Russell's son became a dad over the Christmas season, and spoke about the life-changing moment on Good Morning America on Friday."It's everything everyone says it is," said the Falcon and the Winter Soldier star."The best way I can describe it - and I was talking about it with my wife - is every love song you ever heard is not about your partner, it's about your kids."WATCH: Goldie Hawn's family share glimpse inside festive celebrationsHe added: "The feeling, you can't