I don't know if this was mentioned before but I just checked out Dawn Marie's official website and under the question and answer section she is asked if she is ticklish anywhere? Her response was yes on my knees.
here is the link to her question and answer page so you can see for yourself its about the 8th question down http://www.dawnmarieonline.com/fans/askdawnmarie.html
here is the link to her question and answer page so you can see for yourself its about the 8th question down http://www.dawnmarieonline.com/fans/askdawnmarie.html