...crotch.
You lift your pants to see the same brown fur on the tail spilling out of your underwear like weeds, tickling against the fabric and itching up a storm. You can't help but scratch at the patches of fur spreading thick and wide across every inch of your skin, the itching only getting worse and worse as they thickened. Eventually, you had to stripe and ditch everything below the waist, exposing the brown patches clinging to your hips like a snug-fitting pair of boxers.
You reach down to your furry genitals with shaky hands and knead them testily, sending spikes of thrill and lust up your spine as the tail snaps taunt behind you while you feel them swell and shift ever so slightly under your palm. 'This is all real, ' you realize, feeling the heat of a fever crawling and building on your face. 'Donkey fever, I'm changing into a...' You can't pull your hands away from your cock and balls, not with your fever driving you into a rut. Your kneadings turn into squeezes in a desperate attempt to alleviate the lustful fire burning through your body, to no available - your testicles and your penis just kept on growing and lengthening quicker with each squeeze, bringing your burning lust to new heights. You start stroking yourself, moaning in husky arousal as you approach closer and closer to peaking.
"HAAAAAAW-HEE!" You bray as your dick spurts out what remains of your human seed, spattering it across the chair, your lust and fever relenting and cooling down, for now. You bite your lips as you finally manage to tear your hands away from your pleasure pole, watching it sporting the beginnings of a sheath and a flared head on top of a pair of orange-sized nuts. Your mind feels hazy and cloudy, indecisive about what to do right now.