FURVERT!

1:1 alien ambiguous_gender animal_genitalia anthro aquatic asterozoan butt cilia cloaca duo echinoderm erection genitals human human_on_anthro humanoid_genitalia humanoid_penis interspecies larger_human larger_male male mammal micro monster multi_eye multi_limb penis presenting presenting_cloaca presenting_hindquarters semi-anthro sex size_difference smaller_ambiguous smaller_anthro solo_focus starfish tengridus tentacle_around_penis tentacle_cilia tentacle_sex tentaclejob tentacles teratophilia tube_feet unknown_species xenophilia