慣壞

惯 = 忄 + 贯 : Gitta Giraffe (gu) has already gotten used to (惯) the strange customs in the anthill's bathroom (an4). There are many many flails (忄) stringed together (贯) hanging from the ceiling which have to be passed in order to use the bathroom.

坏 = 不 + 土 : In the airplane's bathroom, there is a clear sign that it is forbidden to enter the room with dirty feet. Helga Horse is quite spoiled though, so she enters right after she went to the muddy stables and spreads dirt all around.