Keywords: double meaning, amusing, slightly sexual I was sitting in my room, doing my homework, when I came across this question in my polymer engineering textbook (_Principles of Polymer Engineering_ by N. G. McCrum, C. P. Buckley, and C. B. Bucknall): "3.12 In Chapter 5 a condition is derived (eqn (5.7)) for determining when localized deformation ('necking') will spontaneously occur during uniaxial extension of a bar of materal. Show that this condition is never satisfied during uniaxial extension of an ideal rubber obeying Gaussian statistics. Such a material therefore extends uniformly." Go ahead and try to read it out loud, especially to a good friend. ;-)
(From the "Rest" of RHF)