I always play on high free will, so my sims will wander off in search of fun if left unattended for even a second. Of course there's some variation in what they choose to pursue. But any sim with the Loves the Outdoors trait will inevitably head for the sprinklers. Adults, elders, kids who just aged up a couple of hours ago and should really be in bed... it doesn't matter. That's all they ever want to do. And since Loves the Outdoors is probably my favorite trait to assign, there's always someone running for the garden at the most inopportune time.
Sometimes I only find out about it when a sim throws a tantrum about not having enough room to use whichever sprinkler head they've picked out because there's, you know, a garden in the way. Stupid plants, always wanting to get watered. Why couldn't they have arranged to be planted somewhere else?
