FURVERT!

anthro biped black_nose briefs briefs_only bulge canid canine canis clothed clothing detailed_bulge erection erection_in_briefs erection_in_underwear erection_under_clothing eyes_closed flexing fur furniture genital_outline grey_body grey_fur grey_hair grey_text hair hand_behind_head hands_behind_head istani lying male male_anthro mammal monotone_briefs monotone_clothing monotone_underwear muscular muscular_anthro muscular_male on_back pecs penis_outline pose sleeping sleeping_in_underwear sleeping_on_sofa sofa solo tighty_whities topless underwear underwear_only white_body white_briefs white_clothing white_fur white_underwear wolf