I think touching hands, being playful is a part of an act during interviews.
I mean i have noticed JW doing and being at ease with HC like this. Baat krte krte touching hands eye to eye laughing and ohhhh and same with Pranali and HC.
Have noticed few other co stars in a similar or other way. I understand they work together and are at ease but where did that goes once the show is off air.
Completely my random thought. I can be wrong