Rule 34 Dev - 3_heads anthro bedroom_eyes belt canid canine cerberus christmas conjoined costume erection grin grumpy half-closed_eyes holidays line_art male male_focus male_only mammal mistletoe multi_head muscular muscular_male nightterror one_eye_closed open_coat open_pants open_robe penis plant precum santa_costume seductive sheath_through_fly smile solo solo_focus stern ursid wink|3480402096