How to get involved in feelings maintaining Equanimity?
It is your perception which recognises and classifies it as funny or not. Tired with it arises the sensation which is pleasant, unpleasant or neutral. You have to be equanimous towards it.

Also if the chattering is senseless chattering this is not right speech also. Why idle chattering is not conducive is with whatever you say the other person likes it or dislikes it reacting with craving or aversion. Also it creates verbal fabrications. And makes your mind distracted, than concentrated.

So limit conversation to what is important. Try to maintain equanimity towards sesations when talking also.