Tough, but ticklish feet
While it makes sense that walking barefoot would de-sensitize, and toughen up someone's foot, it doesn't always work that way. When I was in high school, there was this hot, cute, tall red-head named Dawn(not her real name - the names have been changed to protect the ticklish). She always walked around barefoot(and she had really cute feet!) She could walk barefoot on sharp stones, or on a gravel street on a hot day, and it didn't seem to bother her at all. She was part of the cool crowd, and I was a geek, so I didn't have the nerve to talk to her, let alone touch her foot. She lived near me, so we took the same bus to school, and one day on the bus, I heard Dawn laughing, saying "Cut it out, Kelly!" Kelly was her friend, and a definite ticklefile(she tickled a lot of people on the bus). I couldn't see what was happening, but I heard Kelly "Look how ticklish she is! All I have to do is touch her foot, and she can't take it!"
A couple more times that year, I saw Kelly tickle Dawns foot on the bus, and each time Dawn screamed or laughed.
Another girl that lived right down the street, where I grew up, used to JOG in her bare feet on the street. But I eventually found out she also had hyper-ticklish feet 😀
I always thought it was so cool that some women put their feet through so much abuse, and yet they still can't take a little tickle!😛