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abs absurd_res anthro asphyxiation balls bdsm biped bondage bound bubble byondrage drowning erection front_view full-length_portrait genitals grey_background greyscale hair hands_behind_back hi_res male mammal monochrome muscular muscular_anthro muscular_male nipples nude pecs penis peril portrait rhinoceros short_hair simple_background solo submissive submissive_male underwater water