Is tickling babies' tummies good or bad?

There appears to be no actual studies done on the effects of tickling a baby. Here is my two cents: I think in general, tickling could be an unpleasant experience for some. I personally do not enjoy being tickled. However, it elicits a natural response of laughing. Babies may then appear to be enjoying the tickling even though that may not be true. Babies are also unable to move away from the tickling. Still, I do not think there is any detrimental impact to the baby. Perhaps just be more wary of the baby’s body language to see if whether the tickling has reached a stage that is causing discomfort to him/her.