This is a recurrent theme in the Realtickling clips, especially by the Tickler in Black like someone else said. There is one Realtickling clip that will bring you to your knees if this kind of thing turns you on. Go to the Realtickling clip store and search for Faith. There are three clips in the series, I believe. The best one is the one in which Faith's feet are elevated and lie against a pole. The tickler is an Asian girl who commands Faith to spread her toes apart and keep them still while she tickles in between her toes and up and down her arches with a vibrating device. Faith has gorgeous high arched feet and you can tell by the strain in her toes that it tickles her like crazy, but she manages to allow her feet with toes curled back and spread apart to be tickled for a long time. It is a nut drainer.