Its also possible that she didn't want to admit she was ticklish on her feet when she was fighting because she did not want to expose a weakness/vulnerability. There have been instances when mma fighters and amateur wreslers will discreetly poke spots that they think might be ticklish on there opponents to get themselves out of a tight/disadvantageous position. I've seen a rare clip or two of this on mmafighting.com. Some people find it funny, although tickling is against the rules. Among her wikifeet pics, there is a CU of her bare feet right by her furry little dog and an emoji of a face laughing so hard it has tears coming out of it's eyes. It is possible the dog may have inadvertantly tickled her feet by licking or rubbing up against them. At least, that was my interpretation of it.