"[P]erhaps the most significant result of the 'Molecular Biology' of the past 25 years is the bond it has established between ourselves and the 'lower animals'. They have become so close to us. Indeed, nowadays one has the same feeling of unease in speaking of the 'lower animals' as one would in referring to the 'lower classes' [...] I am sure that insects can feel pain if the right stimulus is given. High temperature seems the clearest example, and perhaps electric shocks. For practical purposes why not assume that that is so? Most operations on insects are actually facilitated if the insect is narcotized."