Do you need to use your clothes dryer?

Today, while doing the laundry, I was wondering why people uses clothes dryers so much when I do not think it is really necessary. A clothes dryer is, in general, quite an inefficient machine, if we consider the energy used for a single drying cycle, which can reach 3-4 kWh per cycle. If the washing machine is efficient enough, clothes are just wet at the end of the spin cycle, and all what they need to dry is to be left on a line for some hours. Using a dryer is a double waste of energy: you consume a lot of energy to dry your clothes, and reduce their life! In a period when energy is becoming a problem, it might be worth to think to that! Other information about energy saving can be found here.