What gets bigger the more you take away from it and what gets wetter as it dries?
A hole in the ground and a towel.
A hole. A hole. A bank overdraft gets bigger as you withdraw more funds from it. John McCain's left cheek. Yup. Hole is the 'it'. And what about right cheek?
A towel gets wetter and wetter as it dries.
It is a play on words. 'Dries' can mean both the act of drying something, or the process of something becoming dry by itself. So while the towel 'dries' something else, it is …getting wetter, the opposite of what would happen if a towel 'dries' by being left on a towel rail.
A towel because when you dry your hands, it gets wetter .
towel or napkin