While it is a "delicate" topic, checking your stud cat's breeding equipment should be part of his general health and grooming check-up.
Are you afraid of giving your cat an injection? Does tube-feeding intimidate you? How about giving a cat a pill? Learning new skills can seem overwhelming to the new cat breeder. The good news is that if you can muster up the courage (and knowledge) to try, almost everything is easier to do with just a bit of practice.