FURVERT!

2016 alien ambiguous_gender armor blackmesajoe_(artist)bodily_fluids clothing duo erection fellatio first_person_view genitals gordon_freeman half-life heart_symbol hi_res human interspecies kingpin_(species)lying male male/ambiguous male_penetrating male_pov mammal monster not_furry on_back oral oral_penetration outside penetration penile penis saliva sex slime solo_focus tentacles unusual_anatomy unusual_genitalia valve valve_corporation xen_(half-life)xen_(setting)xenophilia