Why did Hellen Keller wear such tight pants?

http://web.ebscohost.com/ehost/pdf?vid=7&hid=106&sid=7e06ad5c-cdd9-4eda-aa6c-78b2e4f1f1a8%40sessionmgr111

http://jcm.highwire.org/cgi/reprint/33/8/2209

http://jama.ama-assn.org/cgi/reprint/286/6/688

http://www.journals.uchicago.edu/doi/pdf/10.1086/313741?cookieSet=1

http://www.ajph.org/cgi/reprint/85/6/843

http://jama.ama-assn.org/cgi/reprint/281/20/1906

WHAT is the answer to your joke??? I don't remember and I don't remember if we said it in class???