FURVERT!

abs anthro balls blush bovid bulge canid canine canis casual_erection casual_exposure casual_masturbation casual_nudity curtis_wuedti domestic_cat domestic_dog erection erection_under_towel exhibitionism facial_hair felid feline felis flashing genitals glans group heterochromia hi_res humanoid_genitalia humanoid_penis male male/male mammal masturbation navel nipples nude penile penile_masturbation penis sauna sitting solo_focus tenting towel towel_around_neck towel_on_lap voyeur