2015 belly belly_scales big_penis black_body black_scales claws crouching digitigrade dragon erection european_mythology feral frill_(anatomy) genitals hi_res looking_pleasured low-angle_view male masturbation membrane_(anatomy) membranous_frill membranous_wings morghus mythological_creature mythological_scalie mythology open_mouth penile penile_masturbation penis rakisha scales scalie sharp_teeth side_view solo spade_tail tail teeth western_dragon white_belly white_body white_scales wing_claws wings wyvern