Teen

The Sims 2
Teenager is the fourth life stage of a Sim in The Sims 2, and lasts for a maximum of 15 days. It has also been confirmed that in The Sims 3, this stage is available too.
 * When a Sim child becomes a teenager, their life aspiration is set by the player for the first time, and when Nightlife or later expansion packs are installed, turn-ons and turn-offs too.
 * The teenage stage is crucially important to a Sim's development, as romantic relationships can develop for the first time (and most teen Sims will have a recurring want for their first kiss) and - when University is installed - success at school and in skill building can earn valuable scholarship money.
 * Teens can also take a part time job.
 * Some teens have hygiene problems - they can get zits if hygiene drops. This adds an "use acne cream" option when using the mirror and the teen will act frightened when they "gussy up"
 * Some teens will run away if their relationship with their family is too low.
 * Teens can cook, drive a car (Nightlife Expansion Pack required), and use gym equipment.
 * They can live on their own if they become orphans or when all older sims have moved out of the lot.
 * Teens are unique in that they can grow up into one of two separate ages: Adult or Young Adult, the former will happen if the teen does not go to University.
 * Without the "InTeenimater" download, available from many sources, teens cannot WooHoo, but can drive a Car(Nightlife expansion pack required,) and are no more than children that can drive, go steady, and take part in a job. Once you install the "InTeenimater" and get a teenage Sim pregnant, the teen will become a "pseudo-adult." All this means is that while your teen is pregnant, she will act like an adult, yet keep teenage characteristics, until she gives birth. After she gives birth, she will then turn back into a teenager, but three days will be added to their clock, which is the normal pregnancy period.

The Sims 3
Teen is a featured life stage in The Sims 3