Depends.
If I have something to be giggling about then I'll giggle and go on like a little 10 year old school boy looking at a 40 year old playboy.
But usually I'm just sitting back enjoying the company, tranquillity and the fight of the fish that's attached itself on my hook (if I'm not partaking on the ingestion of food or drink_.
There's an old saying:
You don't stop laughing because you grow old.
You grow old because you stop laughing