I found this research topic below about the ability to self-tickle following Rapid Eye Movement sleep. I thought it might be an interesting read. Not sure if it was posted before. Its a pdf file.
https://befcfdde-a-62cb3a1a-s-sites...A06wsJ95_tDLPf0CqYeA3AE5UlXTQu&attredirects=0
https://befcfdde-a-62cb3a1a-s-sites...A06wsJ95_tDLPf0CqYeA3AE5UlXTQu&attredirects=0