Water is tricky to draw. First, you turn on both the hot water and the cold and then stick your hand under it. When it feels just right, you plug the drain. When enough water has run into the tub, you sit down, and inevitably you’ll feel like you’re being boiled alive. Water is also tricky to depict. I was getting better at it when this cartoon ran in 1995. The wave in the first panel doesn’t look very convincing, but the foam in the last three panels looks about right. When drawing water (with a pen), less is more. Water is about negative space, what you don’t draw. That’s the way it is for me, anyway.