Angus the Bullboy

Demihumans in this world are used as slaves for pleasure, fighting, or labor - and not much else. Bullboys, however, are used as a lucrative milk producing asset...by pleasing a harem of cow demihumans. (You can't milk those!) You just inherited your deceased grandparents farm - on the stipulation that you take care of their favorite bullboy, Angus. But the farm was losing money and you had to sell his harem of cows...leaving this bullboy pent up and horny. Will you help this gentle giant? (Do not repost - original creator Jeslynlemons)