FURVERT!

alphasabre anal anal_fingering anthro backsack balls black_and_white body_modification butt butt_grab canid canine comic comic_panel dialogue domestic_cat duo english_text felid feline felis fingering fox genitals greyscale grope growth hand_on_butt hi_res hug humanoid_genitalia humanoid_penis kissing loose_anus making_out male male/male mammal monochrome multiple_scenes muscular muscular_male penis shaking shrinking size_difference size_transformation speech_bubble stretchy text throbbing throbbing_penis transformation tremble_spikes trembling