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abs alien alien_(franchise)big_bulge big_muscles big_pecs big_penis black_body bodily_fluids bulge clenched_teeth clothing drooling duo eyeless genitals hi_res holding_partner human human_on_humanoid humanoid interspecies male male/male mammal muscular muscular_human muscular_male nipples pecs penis saliva saliva_string seloros sharp_teeth signature stubble teeth underwear xenomorph xenophilia