My vet gets a good giggle, too.
Her poor vet tech.
*me* "I need to set an appointment to get a kitten spayed. "
*clerk, after getting age, breed, etc* " Which cat is this?"
*m* "Simon."
*clerk*"I thought you said spay, not neuter."
*vet, from back of office* "Change his file! He is a she! She has a vagina!"
*clerk* "......So.... Simone..."