This is a longer and more serious oral sex test than some of the others on here. It measures your skills in three different categories - expertise, enthusiasm, and experience - the main factors that decide how good a fellatrix you are. You can be experienced without being very enthuiastic, or good, you can be enthusiastic without being very good or experienced, and you can be a friggin' expert, without much enthusiasm or experiences, though it's highly unlikely.
If you come to a question where none of the answers apply to you, skip the question. Don't take a guess, or you'll mess up the results. This test gets very graphic; skip it if you're easily offended. Also, skip it if you're a straight male with no interesting in giving guys head.