FURVERT!

anthro balls belly belly_expansion butt butt_grab canid canine comic dialogue english_text erection expansion flexing flexing_bicep forced forced_transformation genitals giyutanuki hand_on_butt happy hi_res human male mammal markwulfgar masturbation multiple_scenes musclegut muscular nipple_fetish nipple_pinch nipple_play nipples nude nude_male pec_squeeze pecs penis pinch raccoon_dog solo species_transformation tanuki text transformation transformation_by_substance weight_gain