I think the language was very appropriate in this scene, because right after Neal says it, he has a moment of, “Ooops,” which shows that he’s not used to being around kids and has much to learn if he wants to be a dad. I’m not usually around kids, and I typically swear as part of my everyday language without giving it a second thought, so sometimes when I’m around my friends’ kids, one slips out, and I have a moment just like Neal did in that scene. Was a very real moment and a nice little touch of character development for Neal IMO.
That is just an excuse to allow swearing on TV, they could have handled it in another way to express the fact he hasn’t been around kids. You know I just don’t think it is very cute, clever or even funny to swear it is a bad habit and a lot or people don’t want to hear swearing around them or their kids that is just my opinion. Beside what do you gain out of talking like an old sailor 🙁