Among young people engaging in some form of sexual activity, definitions of virginity differ. Virginity is usually defined as the state of a person who has never engaged in sexual intercourse, although there are some gray areas. For example, teenagers that engage in oral sex but not penile-vaginal sex may still identify themselves as virgins; this is sometimes termed "technical virginity." Of those polled, 70% of adolescents aged 11–16 believed oral sex did not disqualify someone from virginity, and 30% believed they were still abstinent.