anthro black_body black_fur blue_eyes blush comparing comparing_penis duo erection foreskin fur genitals green_body green_scales hand_on_penis male male/male penis red_eyes retracted_foreskin scales touching_penis nonimousmate jack_the_kobold tom_the_cat domestic_cat felid feline felis kobold mammal hi_res
The look on Jack's face in the bottom right panel is probably my all-time favourite.