My girlfriend and I have been doing a lot of tickling of one another over the last couple of months. She is pretty much ticklish everywhere, and her feet were one of her most ticklish spots, especially her toes. However the other night, I went to tickle her feet, and there was no reaction. She struggles with holding back reactions, but every once in a while she can manage to hold it back for 30 seconds to a minute. But the entire night, her feet we not ticklish. The other parts of her remained ticklish though, and I asked her about it and she said it tickled, but not enough to do anything. She said it felt like someone tickling her forearm, she could feel the sensation, just didn't have a reaction to it. I am just curious if anyone has heard or seen something like this before, and if it is temporary or if there is something I can try (as far as tickle technique) to do?