I tickled my best friend's mom briefly when their family let me tag along with them to the beach a few years ago. I stroked her foot with a seagull feather and she immediately recoiled her feet
That reminds me of the time I did that to couple of my friends mum’s, never at the beach (cuz I would burn)
But I remember one night it was at a sleep over, and both me and my friend tag team tickled his mum when we came down to make supper after watching wwe at the time (randomly) she was lay on the sofa watching tv and remember we both jumped her in pure ambush form he had her upper body I had her socked feet, I remember him shouting “get her feet Mike! Get her feet, she’s well ticklish there” so of course I did, I remember pulling her sock off half way and her shouting “no don’t you dare!” it was a blurr really and happened all really quickly, but I remember her laughing like crazy, and me holding onto her ankles for dear life! I also remember his mum nearly fell of the sofa at one point to try to escape us. She her called us both ‘little monsters’ once we finished! Haha harmless play at the time, if only I knew then what I would become lol
And another time I remember when my mum friend came over, and I said I had an science experiment to do for school, about the 5 senses. And I remember asking her could she help me as I wanted too see how person responded to tickling(in-regards to touch). And I remember sitting her on a stool, propping her bare foot on a foot stool and using one of those.. like soft play plastic boomer rang toys to stroke up and done her foot. And it got my mums friend, giggling like crazy, especially on her arch and underneath her toes! Fun times shrugs 😁