Perhaps he's having a really good day and everything is making him happy, causing him to laugh. Or maybe he saw something amusing that brought on the laughter.
Maybe he just heard a funny joke and couldn't help but laugh.
It could be to show a contrast between wealth and age, or maybe it's just for comical effect. Not sure exactly.
Maybe he just heard a funny joke and couldn't help but laugh.
Maybe they are having a really good time and something funny happened to make them laugh.
The dog might be laughing in the old cartoon because of a joke, a friendly interaction with another character, or simply because the cartoon creator wanted to show a happy and light-hearted moment.
The old cartoon ladies might be laughing because of a comical situation they found themselves in. Maybe a character did something goofy or they had a moment of unexpected humor.
Maybe they are having a really good time or something funny happened to them.
Maybe he just heard a really funny joke or something hilarious happened to him.
It could be that he's celebrating a big success or achievement and can't contain his excitement and joy. Or perhaps he's just in a goofy mood and laughing for no particular reason.
It could be that something unexpected and comical happened to him in the cartoon's storyline. Maybe he won a big prize or got into a funny mishap.
The cartoon man might be laughing hysterically because he's in a crazy and fun situation. Maybe he's at a party or having a wild adventure that's causing him to burst out laughing.