FURVERT!

2015 anal anal_penetration anthro anthro_penetrated anus backsack balls black_and_white butt cave dragon duo erection genitals hi_res katai larger_male line_art male male/male male_penetrated male_penetrating male_penetrating_male monochrome mythological_creature mythological_scalie mythology nude penetration penis scalie sex signature size_difference smaller_male smaller_penetrated tail tight_fit unknown_species