rule 34 anthro avian balls beak big balls big pecs big penis biped bird bodily fluids body hair bottomwear bottomwear down brown body brown feathers chalkboard chest hair classroom clothed clothing dream and nightmare erection eyewear falcon falconid feathers genital fluids genitals glasses hairy hi res humanoid genitalia humanoid penis inside looking at viewer male manly muscular muscular anthro muscular male nipples pants pants down partially clothed pecs penis precum professor pubes school shindan maker shirtless solo standing tail feathers unzipped unzipped pants zipper 7235783