I have a good problem. My extremely ticklish partner absolutely loses it when I nibble her bare toes and dart my tongue between her too ticklish, but oh so sexy toes. She absolutely goes over the edge. No matter how tightly i have her ankle and foot in my grip, no matter if I have her ankle securely tied down she wiggles and thrashes her foot so much when I nibble her toes it is impossible for me to apply this tickle technique for more than a few seconds. Tying her toes back individually would get the bondage material between her so ticklish skin and my tongue and defeat the purpose. So any suggestions on how to best restrain her feet and toes for some ticklish nibbling?