"Herd immunity," remarked the swarthy thug watching the donkeys file passed him and his new apprentice Todd.
Eighteen year old Todd asked, "Herd immunity? I didn't know donkeys could catch Covid?"
His boss shook his head and lit up a cigar, "Not that kind of hard immunity! I dunno whether donkeys can catch Covid or not? By here immunity, I mean once a donkey joins a herd their immune to any uh, um, reversions."
"Revers-" Todd started to ask.
His boss shoved the smoking cigar into Todd's mouth. "Here you smoke this, it'll put hair on your chest. Besides Doc Moreau keeps telling me leave the cigars for the younger guys."
Todd coughed and sputtered and took a few more puffs thrusting out his chest trying to look manly.
The boss nodded, gave him a thumbs up, he said, "Looking good, Todd, in no time you'll have a herd of females following you up a hill." He winked knowingly.