The subject of real ticklish vs faking has for the most part been beaten to death.
However, I would like to add one more comment.
I think the use of safe words in tickle videos could be a contributing factor to making certain videos look fake. But how much of models screaming stop, this is torture, I can take anymore, can you hear without thinking the model must be faking or why don't they stop and give the model a break. Not that there shouldn't be safe words. But maybe the safe words should be stop, time out, or I need a break.
However, I would like to add one more comment.
I think the use of safe words in tickle videos could be a contributing factor to making certain videos look fake. But how much of models screaming stop, this is torture, I can take anymore, can you hear without thinking the model must be faking or why don't they stop and give the model a break. Not that there shouldn't be safe words. But maybe the safe words should be stop, time out, or I need a break.