This one's kinda cute. A blonde girl is not tied up, and lets a guy tickle her feet. She's not overly ticklish, but does have a nice quiet giggle. She never tries to pull her feet away, so she must be enjoying it.
http://www.youtube.com/watch?v=HqIYBWrjpao&mode=related&search=
http://www.youtube.com/watch?v=HqIYBWrjpao&mode=related&search=