Unlock Actions for Teens doesn't have anything to do with woohooing, that's for a small number of other related interactions like Take Romantic Picture With and playing Juice Pong which are otherwise also blocked. Then on the same menu, Allow Teen-Adult Woohoo will show up and that needs to be set to True as well. On City Hall or an in-game computer, NRaas > Woohooer > Woohoo > Allow Teen Woohoo must be set to True.
Teen woohoo is blocked by the game core and is not unblocked by Woohooer by default.
