Rumble Rapids

To claim this quest:

The Naiads love the deep, rumbly vibrations that the waterfalls make in the smooth stone that surrounds their grotto. Some humans also find that strong vibration can assist in building up their own waterfalls. Experiment with various levels of vibration against different parts of your anatomy (a good, strong wand is especially recommended for this quest.) Play with vibration for five sessions, either along or with a partner, thinking / talking about what seems like it is working and what isn’t, and regardless of whether you are able to squirt, you can claim this quest.