Many people think the purpose of the towels are drying things. In fact they are often used to many places. For example to sit, lie and stand on, to avoid direct contact with the ground, sand, rock, chair, etc. This may be for hygiene and comfort, and in saunas or other places where nudity is common.
In Asian countries, towels are used as handkerchiefs. Men and women both carry them. The softness of the Turkish-type towel makes it a favourite for use.
Towels can also be used like a whip in what is known as towel snapping, hold hot objects, much like an oven glove, may also be used as a head dress for wet hair, can be used as a "sling" for a broken arm and so on.
At sporting events, sometimes towels are handed out to fans to wave around to cheer on their team.
Thus it can be seen the towels have a lot of purpose. If you observe carefully,you will find more purpose of the towels.