At what age do you think it's OK for someone to start having oral sex?

​Most males said it was OK at 16, and most females were OK with it by 18. Two females and zero males said it was appropriate to wait until age 21; four females and zero males said, "never."

SOURCE: http://blogs.laweekly.com/informer/2011/01/sex_survey_los_angeles.php?page=2