I breed and show rabbits and bucks often have the issue with letting their penises hang out too long and the area becomeing dry so it cannot be withdrawn. We keep vaseline on hand for this...especially if medication isn't needed as in neosporins. Vaseline is also safe if small amounts are licked. We used to use it in our dance group by putting it our teeth to encourage smiles while performing...it sounds odd but it works! You might want to try keeping the area lubricated with a non medicated ointment after the scabbing has healed.
Good luck!
Jennifer