It's always been.Lol. A country of perverts.
Could be an underwater precipice/cliff that they were by. Could also be magic. Or they just wanted that scene and didn't incorporate it well.On page 10 the water was shallow enough for them to stand in it, but on page 11 its deep enough for them to be fully submerged with fish swimming above them and no sign of the bottom, and then shallow enough to stand up again on page 12.