Can Teen Sims WooHoo in The Sims 2?

No. In The Sims 2, **Teen Sims cannot WooHoo** (the game's term for sexual intercourse / "Try for Baby").

Teen Romantic Limits in TS2

Can: Flirt, Kiss (First Kiss memory), "Make Out" (on bed/sofa — heavy petting, fully clothed, raises relationship), "Go Steady," Get Engaged (engagement ring), Plan Wedding.
Cannot: WooHoo, Try for Baby, Get Married (must age to Young Adult/Adult first), Use "Try for Baby" interaction.

Why?

ESRB "Teen" Rating: Explicit sexual content (WooHoo) would risk a "Mature" rating, limiting retail sales.
Life Stage Design: Teens are a distinct stage (School, Aspirations, Parents). Pregnancy/marriage mechanics are tied to Adult/YA stage.

Comparison

Game	Teen WooHoo?	Teen Pregnancy?
The Sims 1	No (Play "Play in Bed" = kiss)	No
The Sims 2	No	No
The Sims 3	No (base); Yes with mods (NRaas Woohooer)	No (base); Yes with mods
The Sims 4	No (base); Yes with "Teen Pregnancy/Woohoo" mods (WickedWhims, etc.)	No (base); Yes with mods

Mods (PC Only): InTeenimater (TS2 classic mod) enables Teen WooHoo/Pregnancy/Marriage. Use at own risk; can corrupt neighborhoods if not installed cleanly.

Game Boy