FURVERT!

1:1 animal_genitalia animal_penis anthro balls canid canine canine_genitalia canine_penis close-up comparing comparing_penis curiosity curious duo erection felid foreskin genital_close-up genital_exploration genitals humanoid_genitalia humanoid_penis kingparked knot knot_in_sheath knotted_penis lipsticking male male/male mammal mikko_(mikkoad)partially_retracted_foreskin penis penis_close-up penis_tip prehistoric_species presenting presenting_genitalia presenting_penis saber-toothed_tiger sheath show_me_yours