Go outside of class and walk around.
Take into account public structures and places where people put their hands and feet. Additionally, take into account structures that afford for people with disabilities — these are of utmost importance.
Observe the commonality of these "touch" surfaces. What aspects do they have in common? What is their relationship to the human form?
Take note of public forms that seem to be most harmonious with the human body. Also take note of forms that don't fit the human body well.
Replicate aspects of this public form into another object, another interface, etc. Put another way, transpose forms from one context to another.
Observe these new forms you and your peers have created. Discuss how and why they relate to the human body.